function getDoc(id){
				return document.getElementById(id);
			}
			
			function changeTab(id){
				document.getElementById("tab1").style.display = "none";
				document.getElementById("tab2").style.display = "none";
			
				document.getElementById("tab" + id).style.display = "block";
			}

function clearText(thefield){
if (thefield.defaultValue==thefield.value)
thefield.value = ""
}