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("Email address seems incorrect (check @ and .'s)")
			return false
		}
	
		var user=matchArray[1]
		var domain=matchArray[2]
		
		if (user.match(userPat)==null) {
			alert("The username doesn't seem to be valid.")
			return false
		}
	
		var IPArray=domain.match(ipDomainPat)
	
		if (IPArray!=null) {
			// this is an IP address
			  for (var i=1;i<=4;i++) {
				if (IPArray[i]>255) {
					alert("Destination IP address is invalid!")
				return false
	
				}
	
			}
	
			return true
	
		}
	
		var domainArray=domain.match(domainPat)
	
		if (domainArray==null) {
			alert("The domain name doesn't seem to be valid.")
			return false
		}
	
		var atomPat=new RegExp(atom,"g")
		var domArr=domain.match(atomPat)
		var len=domArr.length
	
		if (domArr[domArr.length-1].length<2 || 
			domArr[domArr.length-1].length>4) {
		   alert("The address must end in a valid domain, or two letter country.")
	
		   return false
	
		}
	
		if (len<2) {
		   var errStr="This address is missing a hostname!"
		   alert(errStr)
		   return false
		}
		return true;
	}



	function validate(form)
	{
		if(form.name.value == ""){
				alert('Please enter your name');
				form.name.focus();
				return false;
			}
			
		if(form.name.value == ""){
				alert('Please enter your name');
				form.name.focus();
				return false;
			}
	
		if(form.email.value == ""){
				alert('Please enter your email address');
				form.email.focus();
				return false;
			}
	
	    if(!form.email.value.match(/[a-zA-Z\.\@\d\_]/)){
	           alert('Invalid e-mail address.');
	           form.email.focus();
			   return false;
	        }
	
		if (!emailCheck (form.email.value) ){
				form.email.focus();
				return (false);
			}
	
		if(form.subject.value == ""){
				alert('Please enter your subject');
				form.subject.focus();
				return false;
			}
	
		if(form.message.value == ""){
				alert('Please enter your measage');
				form.message.focus();
				return false;
	
			}
	
		return true;

	}