Hi sbramhaji,
As you are not explaining in details so i am assuming the below as your requirement.
<html xmlns="http://www.w3.org/1999/xhtml"> <head runat="server"> <title></title> <script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.8.3/jquery.min.js"></script> <style type="text/css"> input[type=text]:focus { background-color: Yellow; } input[type=text]:blur { background-color: white; } </style> </head> <body> <form id="form1" runat="server"> <div> <input name="txtMoNumber" type="text" id="txtMoNumber" placeholder="Mobile Number" /> </div> </form> </body> </html>
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