function MM_jumpMenu(targ,selObj,restore){ //v3.0
  eval(targ+".location='"+selObj.options[selObj.selectedIndex].value+"'");
  if (restore) selObj.selectedIndex=0;}
  
  

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

function esconder(id,accion){
	if (accion == 'esconder')
		document.getElementById(id).style.visibility = "hidden";
	else
		document.getElementById(id).style.visibility = "visible"; }