function showText(ob, txt){
	if (ob.value == "") {
		ob.value = txt;
	}
}
function clearText(ob, txt){
	if (ob.value == txt) {
		ob.value = "";
	}
}
function abreliguas(targ,selObj,restore){
  eval(targ+".location='"+selObj.options[selObj.selectedIndex].value+"'");
  if (restore) selObj.selectedIndex=0;
}