<script type="text/javascript" language="javascript">
 function clickButton(e)
		 { 			
			var bt = document.getElementById('ctl00_ContentPlaceHolder1_btnSubmit');			
			if (typeof bt == 'object')
			{ 
			    if(navigator.appName.indexOf("Netscape")>(-1))
			    { 
				    if (e.keyCode == 13)
				    { 
						    bt.click(); 
						    return false; 
				    } 
			    } 
			    if (navigator.appName.indexOf("Microsoft Internet Explorer")>(-1))
			    { 
				    if (event.keyCode == 13)
				    { 
						    bt.click(); 
						    return false; 
				    } 
			    } 
			} 
         }


    </script>