function roll_over(img_name, img_src)
{
	document[img_name].src = img_src;
}

function resetField(element){

     if(element.value.length==0){
        element.value="Cerca...";
     }
}

function clearField(element){
   if( element.value=="Cerca..."){
    element.value="";
   }
}
   
function getObj(name)
{
  if (document.getElementById)
  {
        obj = document.getElementById(name);
  }
  else if (document.all)
  {
        obj = document.all[name];
  }
  else if (document.layers)
  {
        obj = getObjNN4(document,name);
  }
  
  return obj;
}

function getObjNN4(obj,name)
{
        var x = obj.layers;
        var foundLayer;
        for (var i=0;i<x.length;i++)
        {
                if (x[i].id == name)
                        foundLayer = x[i];
                else if (x[i].layers.length)
                        var tmp = getObjNN4(x[i],name);
                if (tmp) foundLayer = tmp;
        }
        return foundLayer;
}

function cambio_foto_suc()
{
	var z = new getObj('foto1');
	var w = new getObj('foto2');
    
	z.style.display = "none";
	w.style.display = "";
}

function cambio_foto_pre()
{
	var z = new getObj('foto1');
	var w = new getObj('foto2');
    
	z.style.display = "";
	w.style.display = "none";
}
function MM_openBrWindow(theURL,winName,features) {
  window.open(theURL,winName,features);
}