Use Regular Expression to validate date

Use Regular Expression to validate date : Date : Regular Expressions JAVASCRIPT TUTORIALS

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Use Regular Expression to validate date



<html>
<head>
<title>Date Example</title>
<script type="text/javascript">
    function isValidDate(sText) {
        var reDate = /(?:0[1-9]|[12][0-9]|3[01])/(?:0[1-9]|1[0-2])/(?:19|20d{2})/;
        return reDate.test(sText);
    }
    function validate() {
        var oInput1 = document.getElementById("txt1");
        if (isValidDate(oInput1.value)) {
            alert("Valid");
        } else {
            alert("Invalid!");
        }

    }
</script>
</head>
<body>
    <P>Date: <input type="text" id="txt1" /><br />
    example: 05/05/2005<br />
    <input type="button" value="Validate" onclick="validate()" /></p>
</body>
</html>