function emailCheck(emailStr) {
		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 +")*$");
		var matchArray=emailStr.match(emailPat);
		if (matchArray==null) {
			alert("E-mail address seems incorrect (check @ and . characters)");
			return false;
		}
		var user=matchArray[1];
		var domain=matchArray[2];
		for (i=0; i<user.length; i++) {
			if (user.charCodeAt(i)>127) {
				alert("E-mail address contains invalid characters.");
				return false;
			}
		}
		for (i=0; i<domain.length; i++) {
			if (domain.charCodeAt(i)>127) {
				alert("E-mail address contains invalid characters.");
				return false;
			}
		}
		if (user.match(userPat)==null) {
			alert("E-mail address does not seem to be valid.");
			return false;
		}
		var IPArray=domain.match(ipDomainPat);
		if (IPArray!=null) {
			for (var i=1;i<=4;i++) {
				if (IPArray[i]>255) {
					alert("Destination IP address is invalid!");
					return false;
				}
			}
			return true;
		}
		var atomPat=new RegExp("^" + atom + "$");
		var domArr=domain.split(".");
		var len=domArr.length;
		for (i=0;i<len;i++) {
			if (domArr[i].search(atomPat)==-1) {
				alert("E-mail address does not seem to be valid.");
				return false;
			}
		}
		if (len<2) {
			alert("E-mail address does not seem to be valid.");
			return false;
		}
		return true;
	}

	function RefreshCaptcha() {
		var thisPic = document.getElementById("captchaRefresh");
		var rnd = Math.floor(Math.random() * 100)
		thisPic.src = "inc/Captcha-image.aspx?" + rnd;
	}

	function validate(obj) {
		if (obj.Name.value.length==0) {
			alert('Please provide your Name');
			obj.Name.focus();
			return (false);
		}
		if (obj.Telephone.value.length==0) {
			alert('Please provide your Telephone number');
			obj.Telephone.focus();
			return (false);
		}
		if (obj.Email.value.length==0) {
			alert('Please provide your E-mail address');
			obj.Email.focus();
			return (false);
		}
		if (emailCheck(obj.Email.value) == false) {
			obj.Email.focus();
			return (false);
		}
		if (obj.Subject.value.length==0) {
			alert('Please provide a Subject title');
			obj.Subject.focus();
			return (false);
		}
		if (obj.RequestText.value.length==0) {
			alert('Please enter your Request text');
			obj.RequestText.focus();
			return (false);
		}
		if (obj.Captcha.value.length==0) {
			alert('Please provide the human verification code');
			obj.Captcha.focus();
			return (false);
		}
	}