yyyy-mm-dd validation in javascript

yyyy-mm-dd validation in javascript

My form return value like (2011-10-05)yyyy-mm-dd ... my End date greater than my start date.. How to do validation in javascript ?

View Answers

May 10, 2011 at 12:20 PM

<html>
<head>
<script language="JavaScript">
function checkdate(date1,date2){
var validformat=/^\d{4}\-\d{2}\-\d{2}$/ 
var returnval=false
if(!validformat.test(date1.value)){
alert("Invalid Date 1");
document.form.date1.value="";
}
else if(!validformat.test(date2.value)){
alert("Invalid Date 2");
document.form.date2.value="";
}
else{
var start = document.form.date1.value;
var end = document.form.date2.value;

var stDate = new Date(start);
var enDate = new Date(end);
var compDate = enDate - stDate;

if(compDate >= 0)
return true;
else
{
alert("End date should be greater than start date.");
return false;
} 
}
}

</script>
</head>
<form name="form">
<table>
<tr><td>Enter Start Date:</td><td><input type="text" name="date1" ></td></tr>
<tr><td>Enter End Date:</td><td><input type=text name="date2" ></td></tr>
<tr><td><input type="button" onClick="checkdate(this.form.date1, this.form.date2);" value="Check Date"></td></tr>
</table>
</form>
</html>









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