how to validate gridview textboxes by using javascript

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all textbox is in itemtemplate of template field,i want to that field should make compulsory by using javascript,

please help me.

Posted 14-Mar-13 2:51am

ujali

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Sumit_Kumar_Sinha · Answer 1 · 2013-03-14T02:54:00

Try This one :-

XML

<html xmlns="http://www.w3.org/1999/xhtml" >
<head>
    <title>Untitled Page</title>
    <script type="text/javascript">
    <!--
        function RegainFocus() {
            if((document.getElementById("txt").value).length == 0) {
                document.getElementById("txt").focus();
                alert("The textbox should not be empty");
            }
        }
    //-->
    </script>
</head>
<body>
    <form id="frm">
        <input type="text" id="txt" >
<input type="button" value=" Click " onclick="javascript:RegainFocus();"/>
    </form>
</body>
</html>