function goto(obj,param,pag){
	var url=""+pag+".asp";
	if (document.getElementById(obj).value!="")
		url+="?"+param+"="+document.getElementById(obj).value;
	location.href=url;
}

function borra(obj,valor){
	if(obj.value==valor)
		obj.value="";
}

function rellena(obj,valor){
	if(obj.value=="")
		obj.value=valor;
}

function displayYear() {
	var today = new Date();
	var year = today.getYear();
	if (year < 1000) {year += 1900;}
	return(year); 
}