function emailCheck (emailStr) {
			/* The following variable tells the rest of the function whether or not

			to verify that the address ends in a two-letter country or well-known

			TLD.  1 means check it, 0 means don't. */

			var checkTLD=1;
			var knownDomsPat=/^(com|net|org|edu|int|mil|gov|arpa|biz|aero|name|coop|info|pro|museum|COM|Com|cOm|coM|COm|cOM|NET|ORG|EDU|INT|MIL|GOV|ARPA|BIZ|AERO|NAME|COOP|INFO|PRO|MUSEUM)$/;
			var emailPat=/^(.+)@(.+)$/;
			var specialChars="\\(\\)><@,;:\\\\\\\"\\.\\[\\]";
			var validChars="\[^\\s" + specialChars + "\]";
			var quotedUser="(\"[^\"]*\")";
			var ipDomainPat=/^\[(\d{1,3})\.(\d{1,3})\.(\d{1,3})\.(\d{1,3})\]$/;
			var atom=validChars + '+';
			var word="(" + atom + "|" + quotedUser + ")";
			var userPat=new RegExp("^" + word + "(\\." + word + ")*$");
			var domainPat=new RegExp("^" + atom + "(\\." + atom +")*$");

			

			var matchArray=emailStr.match(emailPat);

			if (matchArray==null) {

			//alert("Email address seems incorrect (check @ and .'s)");
			return false;
			}

			var user=matchArray[1];
			var domain=matchArray[2];

			for (i=0; i<user.length; i++) {
				if (user.charCodeAt(i)>127) {
					//alert("Ths username contains invalid characters.");
					return false;
				 }
			}
			for (i=0; i<domain.length; i++) {
				if (domain.charCodeAt(i)>127) {
					//alert("Ths domain name contains invalid characters.");
					return false;
				}
			}

			if (user.match(userPat)==null) {
				//alert("The email address appears incorrect.");
				return false;
			}

			var IPArray=domain.match(ipDomainPat);

			if (IPArray!=null) {
				for (var i=1;i<=4;i++) {
					if (IPArray[i]>255) {
						//alert("Destination IP address is invalid!");
						return false;
				   }
				}
				return true;
			}
			var atomPat=new RegExp("^" + atom + "$");
			var domArr=domain.split(".");
			var len=domArr.length;
			for (i=0;i<len;i++) {
				if (domArr[i].search(atomPat)==-1) {
					//alert("The domain name does not seem to be valid.");
					return false;
			   }
			}
			if (checkTLD && domArr[domArr.length-1].length!=2 && 
			domArr[domArr.length-1].search(knownDomsPat)==-1) {
				//alert("The address must end in a well-known domain or two letter " + "country.");
				return false;
			}
			if (len<2) {
				//alert("This address is missing a hostname!");
				return false;
			}
			return true;
		}
		//email check
		function emailOK(form, element, message)
		{
			if (form.elements[element]) 
			{
				if (emailCheck(form.elements[element].value))
				{
					return true;
				}
				else {
					//alert (message);
					form.elements[element].focus();
				}
			}
			return false;
		}