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javascript date validation

<html>
<head>
<title>Compare Dates</title>
<Script>
function CompareDates()
{

var str1 = document.getElementById(“fromdate”).value;

var str2 = document.getElementById(“todate”).value;

var dt1  = parseInt(str1.substring(0,2),10);
var mon1 = parseInt(str1.substring(3,5),10);
var yr1  = parseInt(str1.substring(6,10),10);
var dt2  = parseInt(str2.substring(0,2),10);
var mon2 = parseInt(str2.substring(3,5),10);
var yr2  = parseInt(str2.substring(6,10),10);

mon1=(mon1-1);
mon2=mon2-1;

var date1 = new Date(yr1, mon1, dt1);
var date2 = new Date(yr2, mon2, dt2);
if(date2 > date1)
{
alert(“date2 big”);

}
else  if(date2 < date1)
{
alert(“date1 big”);
//document.form1.submit();
}
else
{
alert(“Same or confusing”);
}
}

</Script>
</head>

<body bgcolor=”#FFFFFF” text=”#000000″>

 

<form name=”form1″ method=”post” action=”">

 

<input type=”text” name=”fromdate” id=”fromdate” value=”20/10/2005″>

 

<input type=”text” name=”todate” id=”todate” value=”19/10/2005″>

 

<input type=”button” value=”compare dates” onclick=”CompareDates()”>

 

</form>

 

</body>

 

</html>

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