function EmailChk(val, prequired)
{
	if((val.value)=="")
	{
		if(prequired)
		{
			alert("Blanks are not allowed in E-mail.");
			val.select();
			val.focus();
			return false ;
		}
	}		
	else	
	{ 
		var str = val.value;
		var reg2 = /(@.*@)|(\.\.)|(@\.)|(\.@)|(^\.)|([ ])/; // not valid
		var reg3 = /^.+\@(\[?)[a-zA-Z0-9\-\.]+\.([a-zA-Z]{2,3}|[0-9]{1,3})(\]?)$/; // valid
		if (!reg3.test(str)||reg2.test(str)) 
		{ 
			alert("Please Enter Valid E-mail.");
			val.select();
			val.focus();
			return false;
		}
	}	

	return true;
}