function Input(areaname,checkvalue,formname){
	if(document.forms[formname].elements[areaname].value == checkvalue){
		document.forms[formname].elements[areaname].value = "";
	}
}
function Output(areaname,checkvalue,formname){
	if(document.forms[formname].elements[areaname].value == ""){
		document.forms[formname].elements[areaname].value = checkvalue;
	}
}