// JavaScript Document
function volta_value(obj) {
	var text_val=eval(obj);
	if (text_val.value == "")
		text_val.value = "buscar";
	if (!document.all) return; // IE only
}

function apagar(obj) {
	var text_val=eval(obj);
	if (text_val.value == "buscar")
		text_val.value = "";
	if (!document.all) return; // IE only
}