aspx <html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<title></title>
<script type="text/javascript" src="JScript.js"></script> //reference to jquery plugin
<script type="text/javascript" src="JScript2.js"></script>
</head>
<body>
<form id="form1" runat="server">
<div>
<asp:CheckBoxList ID="chk1" runat="server">
<asp:ListItem >1</asp:ListItem>
<asp:ListItem>2</asp:ListItem>
<asp:ListItem>3</asp:ListItem>
<asp:ListItem>4</asp:ListItem>
<asp:ListItem>5</asp:ListItem>
<asp:ListItem>6</asp:ListItem>
</asp:CheckBoxList>
</div>
</form>
</body>
</html>
JScript2.js $(document).ready(function() {
jQuery("#chk1").click(function() {
var isvalid = false;
$("#chk1").find(":checkbox").each(function() {
if ($(this).attr("checked")) {
isvalid = true;
}
});
if (isvalid == false) {
jQuery("#chk1").find(":checkbox").each(function() {
$(this).removeAttr("disabled");
});
}
else
if (isvalid == true)
{
jQuery("#chk1").find(":checkbox").each(function() {
if (jQuery(this).attr("checked")) {
$(this).attr("enabled", "enabled");
}
else {
$(this).attr("disabled", "disabled");
}
});
}
});
});