<div>
<asp:CheckBox ID="cb1" runat="server" />
<asp:CheckBox ID="cb2" runat="server" />
<asp:CheckBox ID="cb3" runat="server" />
</div>
<script>
window.onload = function () {
(function () {
document.getElementById("cb1").onclick = function () {
checkClickedCheckBoxTrue("cb1", "cb2", "cb3")
};
})();
(function () {
document.getElementById("cb2").onclick = function () {
checkClickedCheckBoxTrue("cb2", "cb1", "cb3")
};
})();
(function () {
document.getElementById("cb3").onclick = function () {
checkClickedCheckBoxTrue("cb3", "cb2", "cb1")
};
})();
};
function checkClickedCheckBoxTrue(cb1,cb2,cb3)
{
var check = document.getElementById(cb1)
if (check.checked)
{
check.checked = true
}
else
{
check.checked = false
}
document.getElementById(cb2).checked = false
document.getElementById(cb3).checked = false
return false;
}
</script>