function trim(str)
{
   return str.replace(/^\s*|\s*$/g,"");
}
function checkMail()
{
	xyz=document.abtus.mailfrom.value;
	//var x = document.aboutus.mailfrom.value;
	var filter  = /^([a-zA-Z0-9_\.\-])+\@(([a-zA-Z0-9\-])+\.)+([a-zA-Z0-9]{2,4})+$/;
	if (filter.test(xyz)){
		//return true;
	}
	else {
		alert('Invalid Email ID. Please enter correct email ID.'); 
		document.abtus.mailfrom.focus();
		return false;
	}
	if (trim(document.abtus.mailsubject.value) == ''){
		alert('Please enter the subject for inquiry.'); 
		document.abtus.mailsubject.focus();
		return false;
	}
	if (trim(document.abtus.mailMessage.value) == ''){
		alert('Please enter the Message for inquiry.'); 
		document.abtus.mailMessage.focus();
		return false;
	}		
}