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<HEAD>
<TITLE>JavaScript Demo Example 9</TITLE>
<script language="JavaScript">
<!--
function MM_findObj(n, d) { //v4.0
var p,i,x; if(!d) d=document; if((p=n.indexOf("?"))>0&&parent.frames.length)
{
d=parent.frames[n.substring(p+1)].document; n=n.substring(0,p);}
if(!(x=d[n])&&d.all) x=d.all[n]; for (i=0;!x&&i<d.forms.length;i++)
x=d.forms[i][n];
for(i=0;!x&&d.layers&&i<d.layers.length;i++) x=MM_findObj(n,d.layers[i].document);
if(!x && document.getElementById) x=document.getElementById(n); return
x;
}
function MM_validateForm() { //v4.0
var i,p,q,nm,test,num,min,max,errors='',args=MM_validateForm.arguments;
for (i=0; i<(args.length-2); i+=3) { test=args[i+2]; val=MM_findObj(args[i]);
if (val) { nm=val.name; if ((val=val.value)!="") {
if (test.indexOf('isEmail')!=-1) { p=val.indexOf('@');
if (p<1 || p==(val.length-1)) errors+='- '+nm+' must contain an e-mail address.\n';
} else if (test!='R') {
if (isNaN(val)) errors+='- '+nm+' must contain a number.\n';
if (test.indexOf('inRange') != -1) { p=test.indexOf(':');
min=test.substring(8,p); max=test.substring(p+1);
if (val<min || max<val) errors+='- '+nm+' must contain a number between
'+min+' and '+max+'.\n';
} } } else if (test.charAt(0) == 'R') errors += '- '+nm+' is required.\n'; }
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document.MM_returnValue = (errors == '');
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</script>
</HEAD>
<BODY BGCOLOR="WHITE">
<h3>Validate data and provide immediate feedback.
<a href="example_9_html.htm">View source.</a></h3>
<form name="numberForm">
<p><b>Please enter a number between 1 and 50 and click the Enter button.</b></p>
<input type="text" name="valueEntered" size="5"
onchange="Validate(numberForm);document.numberForm.valueEntered.focus()">
<input type="button" name="Enter" action="none" value="Enter">
</form>
<p> </p>
<p><a href="JavaScriptDemo.htm">Return to Having Fun with JavaScript</a>.</p>
</BODY>
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