Valid date with format validation in javascript using regular expresion
Before this you may need required field validation using javascript. In this example, we are validating correct date with leap year into consideration using regular expression.
For more form validations go here.
<html>
<head>
<title></title>
<script type="text/javascript">
function ValidateForm() {
var txtDate = document.getElementById("txtDate").value;
var regularExpression = /^(((0[1-9]|[12]\d|3[01])\/(0[13578]|1[02])\/((1[6-9]|[2-9]\d)\d{2}))|((0[1-9]|[12]\d|30)\/(0[13456789]|1[012])\/((1[6-9]|[2-9]\d)\d{2}))|((0[1-9]|1\d|2[0-8])\/02\/((1[6-9]|[2-9]\d)\d{2}))|(29\/02\/((1[6-9]|[2-9]\d)(0[48]|[2468][048]|[13579][26])|((16|[2468][048]|[3579][26])00))))$/;
if (!txtDate.match(regularExpression)) {
alert("Please enter date format.Ex: 05/05/2012");
}
}
</script>
</head>
<body>
Date: <input type="text" id="txtDate" /><br />
<br />
<input type='button' value="validate" onclick="ValidateForm();" />
</body>
</html>
If you have any queries or suggestions, please feel free to ask in comments section.
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