var nn4 = (navigator.appName.indexOf("Netscape") > -1 && navigator.appVersion.indexOf("4") > -1) ? true : false;
 

//function for forcing form submission
function checkEnter(e){
var characterCode;
	 if(e && e.which){
	 e = e;
	 characterCode = e.which;
	 }
	 else{
	 e = event;
	 characterCode = e.keyCode;
	 }	 
	 if(characterCode == 13){
 	
 	 return true;
	 }
return false;
	
}