window.onload = function() {
	/* FORM VERIFICATION */
	document.getElementById("email").onfocus = function(){
		if(this.value == "Email Address"){
			this.value = "";
		}
	}
	document.getElementById("email").onblur = function(){
		if(this.value == ""){
			this.value = "Email Address";
		}
	}
	document.getElementById("zip").onfocus = function(){
		if(this.value == "Zip"){
			this.value = "";
		}
	}
	document.getElementById("zip").onblur = function(){
		if(this.value == ""){
			this.value = "Zip";
		}
	}
	document.getElementById("formMailingList").onsubmit = function(){
		var email = document.getElementById("email").value;
		var zip = document.getElementById("zip").value;
		var filter = /^([a-zA-Z0-9_\.\-])+\@(([a-zA-Z0-9\-])+\.)+([a-zA-Z0-9]{2,4})+$/;
		
		if(!filter.test(email)){
			alert("Please enter a valid email address.");
			return false;
		}
		else {
			if(zip == "Zip"){
				document.getElementById("zip").value = "";
			}
		}
	}
}