// Hide instruction text for password field
function txt2pwd(obj, pwd){
	obj.style.visibility = "hidden";
	document.getElementById(pwd).focus();
}
// Display instruction text for password field
function pwd2txt(obj, txt){
	if(obj.value.length==0){
		document.getElementById(txt).style.visibility = "visible";
	}
}
// Display instruction text [str] if field is blank
// Clear instruction text if field is clicked
function resetField(obj,str){
	if(obj.value.length==0){
		obj.value=str;
		return;
	}
	if(obj.value==str){
		obj.value="";
	}
}