function validateEmail(){
		var correct = true
		var illegalChars= /[\(\)\<\>\,\;\:\\\"\[\]]/
		var emailFilter=/^.+@.+\..{2,3}$/;
		if(document.addEmail.emailAddress.value!=''){
		  if (!(emailFilter.test(document.addEmail.emailAddress.value))){ correct = false; alert("Please enter a valid email address.");	 }
		  else if(document.addEmail.emailAddress.value.match(illegalChars)){ correct = false; alert("The email address contains illegal characters.");}  
		}
		else{
			correct = false;
		}
		if(correct==true){
			alert("Thank you for joining our email newsletter.");
		}
		return correct
	}