<! DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 transitional//en" >
<title> New Document </title>
<meta name= "generator" content= "EditPlus" >
<meta name= "Author" content= "" >
<meta name= "Keywords" content= "" >
<meta name= "Description" content= "" >
<body>
<script language= "JavaScript" type= "Text/javascript" >
<!--
Function default requirement parameter is numeric
function sum (a,b) {
A=parseint (a);
B=parseint (b);
Throws an exception object if a or B cannot be converted to a number
if (isNaN (a) | | isNaN (b)) {
throw new Error ("Arguments are not numbers");
}
return a+b;
}
try{
The wrong call
var s=sum ("C", "D");
}catch (e) {
Show details of an exception
alert (e.message);
}
-->
</script>
</body>
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