Hi baiju,
try this:
<asp:Button runat="server" ID="demoButton" Text="Replace" OnClientClick="javascript:return commaSeparatedString('YYYYNN');"/>
<script type="text/javascript">
function commaSeparatedString(szInputString)
{
while (/(\w+)(\w{1})/.test(szInputString.toString()))
{
szInputString = szInputString.toString().replace(/(\w+)(\w{1})/, '$1' + ',' + '$2');
}
alert(szInputString);//Y,Y,Y,Y,N,N
}
</script>
Hope it helps.
Regards,
Shashikant Gurav
shashikantgurav22@gmail.com