function isDate(day,month,year)
{
		//alert(day+"-"+month+"-"+year);
		switch(parseInt(month)){
			
			case 2:{
				if(isLeapYear(year)){
					if(day<=29) return true;
					else return false;
				}else{
					if(day<=28)	return true;
					else return false;
				}
				break;	
			}
			case 4: case 6: case 9: case 11:{
				if(day<=30)	return true;
				else return false;
				break;
			}
			default:{
				return true;
				break;
			}
		}//end if switch
	}
function isLeapYear (year) {
	return ((year % 4 == 0) && ((year % 100 != 0) || (year % 400 == 0)));
}
function error(obj,msg)
{
	alert(msg);
	obj.focus();
	return false;
}

String.prototype.trim = function()  
{ 
	return this.replace(/^\s+|\s+$/g, ''); 
};

function isValidEmail(email_id) {
	if (/^\w+([\.-]?\w+)*@\w+([\.-]?\w+)*(\.\w{2,3})+$/.test(email_id))
	return (true)
	else
	return false;
}