function ver(buscar){
 if(buscar.parte.checked == true){
   buscar.libro.disabled = false;
  }
  else{
   buscar.libro.disabled = true;
  }
}

function validaTodo(buscar){
 if(buscar.cadena.value.length == 0){
  //alert('Pedid y se os dará; buscad y hallaréis; llamad y se os abrirá. Mt 7:7');
  Window.Growl('Pedid y se os dará; buscad y hallaréis; llamad y se os abrirá. Mt 7:7');
  buscar.cadena.focus();
  return false;
 }
}

var arr1 = new Image();
var arr2 = new Image();

arr1.src = "images/arrow1.gif";
arr2.src = "images/arrow2.gif";

function show_hide_advsearch()
{
 //the next 3 lines are browser detection for user-agent DOMS
 ns4 = (document.layers) ? true:false //required for Functions to work
 ie4 = (document.all) ? true:false //required for Functions to work
 ng5 = (document.getElementById) ? true:false //required for Functions to work
 
 //alert (ng4);
 if (ie4){
  if (document.all["adv_search"].style.display == "block")
   {
    document.all["adv_search"].style.display = "none";
    document.all["adv-link-text"].innerHTML = adv_search_js_strings["advanced_search"];
    document.all["adv-arrow"].innerHTML = "<img border=\"0\" src=\"images/arrow1.gif\" title=\"\" alt=\"\" />";
   }
  else
   {
    document.all["adv_search"].style.display = "block";
    document.all["adv-link-text"].innerHTML = adv_search_js_strings["simple_search"];
    document.all["adv-arrow"].innerHTML = "<img border=\"0\" src=\"images/arrow2.gif\" title=\"\" alt=\"\" />";
   }
  }
 else if (ns4)
  {
   if (document.layers["adv_search"].style.display == "block")
    {
     document.layers["adv_search"].style.display = "none";
     document.layers["adv-link-text"].innerHTML = adv_search_js_strings["advanced_search"];
     document.layers["adv-arrow"].innerHTML = "<img border=\"0\" src=\"images/arrow1.gif\" title=\"\" alt=\"\ />";
    }
   else
    {
     document.layers["adv_search"].style.display = "block";
     document.layers["adv-link-text"].innerHTML = adv_search_js_strings["simple_search"];
     document.layers["adv-arrow"].innerHTML = "<img border=\"0\" src=\"images/arrow2.gif\" title=\"\" alt=\"\ />";
    }
  }
 else if (ng5)
 {
  if (document.getElementById("adv_search").style.display == "block")
   {
    document.getElementById("adv_search").style.display = "none";
    document.getElementById("adv-link-text").innerHTML = adv_search_js_strings["advanced_search"];
    document.getElementById("adv-arrow").innerHTML =  "<img border=\"0\" src=\"images/arrow1.gif\" title=\"\" alt=\"\ />";
   }
   else
   {
    document.getElementById("adv_search").style.display = "block";
    document.getElementById("adv-link-text").innerHTML = adv_search_js_strings["simple_search"];
    document.getElementById("adv-arrow").innerHTML = "<img border=\"0\" src=\"images/arrow2.gif\" title=\"\" alt=\"\ />";
   }
 }
}

function zoom(font_size){
 document.getElementsByTagName("p")[0].style.fontSize = font_size + "px";
}