function changezipcode(){
	if (document.getElementById("countryAddress").value == "unitedstates"){
		document.getElementById("zipAddress").setAttribute("maxLength", 5);
		return;
	}
	else if(document.getElementById("countryAddress").value == "canada"){
		document.getElementById("zipAddress").setAttribute("maxLength", 6);
		return;
	}
	else{
		return;
	}
}