Copyright © 2004
by Polaris Computing.
All rights reserved.
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JavaScript Code for ISBN
Conversion
Following is a JavaScript function that
converts ISBN-10 to ISBN-13. Your Web programs may need it if they
accept ISBN's as input.
The following code is written with Microsoft
Script Editor and FrontPage.
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Language |
JavaScript |
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Development Tool |
Microsoft Script Editor with
FrontPage |
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Disclaimer: All sample
code contained herein is provide to you "AS IS." ALL IMPLIED
WARRANTIES, INCLUDING BUT NOT LIMITED TO THE IMPLIED WARRANTIES OF THE
MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE, ARE EXPRESSLY
DISCLAIMED. |
<script id=clientEventHandlersJS language=javascript>
<!--
function BtnConvert_onclick() {
var i = 0;
var v = 0;
var n = 0;
var c = "";
var Result = "";
var s12 = "";
var ISBN10 = document.FrmConv.TxtISBN10.value;
var len = ISBN10.length;
if (len<9 || len>10) Result = "ERROR";
else {
s12 = "978" + ISBN10.substring(0, 9);
for (i=0; i<12; i++) {
if (Result=="") {
c = s12.charAt(i);
if (c>="0" && c<="9") {
v = c - 0;
if ((i % 2)!=0) v = 3 * v;
n = n + v;
}
else Result = "ERROR"
}
}
if (Result=="") {
n = n % 10;
if (n!=0) n = 10 - n;
Result = s12 + n;
}
}
document.FrmConv.TxtISBN13.value = Result;
}
//-->
</script>
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