275 lines
10 KiB
HTML
275 lines
10 KiB
HTML
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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
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<HTML>
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<HEAD>
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<META http-equiv="Content-Type" content="text/html; charset=utf-8">
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<!-- (C) Copyright IBM Corporation, 2005 -->
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<!-- All rights reserved. Licensed Materials Property of IBM -->
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<!-- US Government Users Restricted Rights -->
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<!-- Use, duplication or disclosure restricted by -->
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<!-- GSA ADP Schedule Contract with IBM Corp. -->
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<TITLE>TCP/IP subnet calculator</TITLE>
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<link rel="stylesheet" type="text/css" href="../rzahg/ic.css">
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<SCRIPT language="JavaScript" type="text/javascript">
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<!-- //////////
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var loopbackmessage = "The 127 network address is reserved for loopback addresses. Do you want to continue?";
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var numericmessage = "Network addresses consist of numeric characters only. Enter a numeric network address";
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var classbmessage1 = "The first segment of your network address belongs to a class B address. To use this subnet calculator, the third segment of a class B address must be 0";
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var classamessage = "The first segment of your network address belongs to a class A address. To use this subnet calculator, the second and third segment of a class A address must be 0";
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var nonumeric2 = "Each segment must have a numeric IP address.";
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var segment1message1 = "Segment 1 must be greater than 1 and less than 256";
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var segment2message1 = "Segment 2 must be greater than or equal to 0 and less than 256";
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var segment3message1 = "Segment 3 must be greater than or equal to 0 and less than 256";
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var classbmessage3 = "The first segment of your network address belongs to a class B address. To use this subnet calculator, the second segment of a class B address must be greater than 0";
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var classcmessage1 = "The first segment of your network address belongs to a class C address. To use this subnet calculator, the second segment of your network address cannot equal 0";
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var classcmessage2= "The first segment of your network address belongs to a class C address. To use this subnet calculator, the third segment of your network address cannot equal 0";
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var nonumeric3 = "Network addresses consist of numeric characters only. Enter a numeric network address";
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var nonumeric4 = "Network addresses consist of numeric characters only. Enter a numeric network address";
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var numericmessage1 = "You must only enter integers";
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//START NON-TRANSLATABLE
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function sender() {
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var newsegment1 = parent.hidden.data[1]
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if (newsegment1 <= 127) {
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// Send to Class A choices
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window.location = "rzak1advsub18.htm";
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}
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if (newsegment1 >= 128 && newsegment1 <= 191) {
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// Send to Class B choices
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window.location = "rzak1advsub20.htm";
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}
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if (newsegment1 >= 192) {
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// Send to Class C choices
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window.location = "rzak1advsub25.htm";
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}
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}
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// Update the fields based on first segment entries. Also do one syntax check.
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function updateData(form) {
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var newseg1 = form.segment1.value
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var loopcheck = parseInt(newseg1)
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// class A
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if (newseg1 < 127 && newseg1 >= 1) {
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form.segment3.value = 0;
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form.segment2.value = 0;
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} else {
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// class B
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if (newseg1 >= 128 && newseg1 <= 191) {
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form.segment2.value = "";
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form.segment3.value = 0;
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} else {
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// class C
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if (newseg1 > 191 && newseg1 < 256) {
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form.segment2.value = "";
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form.segment3.value = "";
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}
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}
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}
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// Performs syntax check for loopback address
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if (loopcheck == 127) {
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// Confirms use of loopback for network address. If cancel, segment one is blanked
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if (!(confirm(loopbackmessage))) {
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form.segment1.value = "";
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form.segment2.value = "";
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form.segment3.value = "";
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}
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}
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if (isNaN(newseg1)) {
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alert(numericmessage);
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newseg1 = parseInt(newseg1);
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if (isNaN(newseg1)) {
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form.segment1.value = "";
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} else {
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form.segment1.value = newseg1;
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}
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}
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}
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function checkData(form) {
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var newsegment1 = parseInt(form.segment1.value);
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var newsegment2 = parseInt(form.segment2.value);
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var newsegment3 = parseInt(form.segment3.value);
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if (newsegment1 >= 128 && newsegment1 <= 191 && newsegment3 != 0) {
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alert(classbmessage1);
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form.segment3.value = 0;
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}
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if ((newsegment1 < 128 && newsegment2 != 0) ||
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(newsegment1 < 128 && newsegment3 != 0)) {
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alert(classamessage);
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form.segment2.value=0;
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form.segment3.value=0;
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}
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}
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function goback(formObj) {
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var newsegment1 = formObj.segment1.value;
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var newsegment2 = formObj.segment2.value;
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var newsegment3 = formObj.segment3.value;
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parent.hidden.data[1] = newsegment1;
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parent.hidden.data[2] = newsegment2;
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parent.hidden.data[3] = newsegment3;
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window.location="rzak1advsubwelcome.htm";
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}
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function syntaxcheck(formObj) {
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var newsegment1=formObj.segment1.value;
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var newsegment2=formObj.segment2.value;
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var newsegment3=formObj.segment3.value;
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var good = 0;
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// if all fields are blank
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if (newsegment1 == "" || newsegment2 == "" || newsegment3 == "") {
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alert(nonumeric2);
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} else {
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while (good == 0) {
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if (newsegment1 <= 1 || newsegment1 > 255) {
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alert(segment1message1);
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document.getipaddress.segment1.select();
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document.getipaddress.segment1.focus();
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break;
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}
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if (newsegment2 < 0 || newsegment2 > 255) {
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alert(segment2message1);
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document.getipaddress.segment2.select();
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document.getipaddress.segment2.focus();
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break;
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}
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if (newsegment3 < 0 || newsegment3 > 255) {
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alert(segment3message1);
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document.getipaddress.segment3.select();
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document.getipaddress.segment3.focus();
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break;
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}
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if (newsegment1 >= 128 && newsegment1 <= 191 && newsegment2 <= 0) {
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alert(classbmessage3);
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break;
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}
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if (newsegment1 >= 192 && newsegment2 <= 0) {
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alert (classcmessage1);
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break;
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}
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if (newsegment1 >= 192 && newsegment3 <= 0) {
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alert(classcmessage2);
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break;
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}
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if (isNaN(newsegment2)) {
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alert(nonumeric3);
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break;
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}
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if (isNaN(newsegment3)) {
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alert(nonumeric4);
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break;
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}
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if (newsegment1.indexOf(".") >= 0) {
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alert(numericmessage1);
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break;
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}
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if (newsegment2.indexOf(".") >= 0) {
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alert(numericmessage1);
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break;
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}
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if (newsegment3.indexOf(".") >= 0) {
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alert(numericmessage1);
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break;
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}
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// Stores the form values into the container
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parent.hidden.data[1] = newsegment1;
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parent.hidden.data[2] = newsegment2;
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parent.hidden.data[3] = newsegment3;
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//Call the sender function
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sender();
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good = 1;
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}
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}
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}
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//Obtain name of HTML file in parent frame.
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var parentDir = parent.window.location.href.substring(0,location.href.lastIndexOf('/')+1);
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var parentUrl = parent.window.location.href.substring(parentDir.length,parent.window.location.href.length+1);
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if (parentUrl.indexOf("#") >= 0) { parentUrl = parentUrl.substring(0,parentUrl.indexOf("#"));}
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function checkFrame() {
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//Is the hidden frame already loaded with the correct html?
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if (parentUrl != "rzak1advsubwelcome.htm") {
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window.location = "rzak1advsubwelcome.htm"; //load calculatorframeset
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return;
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} else {
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//Obtain name of HTML file in hidden frame.
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var hiddenDir = parent.hidden.window.location.href.substring(0,location.href.lastIndexOf('/')+1);
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var hiddenUrl = parent.hidden.window.location.href.substring(hiddenDir.length,parent.hidden.window.location.href.length+1);
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if (hiddenUrl.indexOf("#") >= 0) { hiddenUrl = hiddenUrl.substring(0,hiddenUrl.indexOf("#"));}
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if (hiddenUrl != "rzak1advsubhidden.htm") {
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//Correct HTML not loaded, load it
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parent.hidden.window.location = "rzak1advsubhidden.htm";
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} else { //already loaded
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restorevalues();
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}
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}
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}
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function restorevalues() {
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// This function restores previous values to the text fields. If the
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// first variable is blank, then nothing is restored
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var restsegment1 = parent.hidden.data[1];
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var restsegment2 = parent.hidden.data[2];
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var restsegment3 = parent.hidden.data[3];
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restsegment1 = parseInt(restsegment1);
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restsegment2 = parseInt(restsegment2);
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if (!(isNaN(restsegment1))) {
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document.getipaddress.segment1.value = restsegment1;
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if (isNaN(restsegment2)) {
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restsegment2 = "";
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}
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document.getipaddress.segment2.value = restsegment2;
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if (isNaN(restsegment3)) {
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restsegment3 = "";
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}
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document.getipaddress.segment3.value = restsegment3;
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}
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}
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//END NON-TRANSLATABLE
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//////////-->
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</script>
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</HEAD>
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<BODY onload="checkFrame()">
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<h2>TCP/IP subnet calculator</h2>
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<STRONG>Enter your network address</STRONG>
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<noscript>
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<p>This calculator uses Javascript to function. Ensure you are using a browser which supports Javascript and that Javascript is enabled.</p></noscript>
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<p><label for="ipsegment">Enter the network address that you want to subnet. This calculator can subnet class A, class B,and class C addresses.</label></p>
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<p>Each segment of a valid network address must be between 0 and 255, and the first segment of any network
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address must be greater than 1.</p>
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<form name="getipaddress">
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<INPUT TYPE="text" SIZE=3 MAXLENGTH=3 NAME="segment1" id="ipsegment" onKeyUp="updateData(this.form)"> <strong>.</strong>
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<INPUT TYPE="text" SIZE=3 MAXLENGTH=3 NAME="segment2" id="ipsegment" onKeyUp="checkData(this.form)"> <strong>.</strong>
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<INPUT TYPE="text" SIZE=3 MAXLENGTH=3 NAME="segment3" id="ipsegment" onKeyUp="checkData(this.form)"> <strong>.</strong> 0
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<P><br><br><br>
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<center>
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<INPUT TYPE="button" VALUE="<< Back" onclick="goback(getipaddress)">
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<INPUT TYPE="button" VALUE= "Next >>" onclick="syntaxcheck(getipaddress)">
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</center>
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</form>
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</BODY>
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</HTML>
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