function getPosizioneOrizzontaleObj(obj)
{
   var curleft = 0;
   if (obj.offsetParent)
   {
       while (obj.offsetParent)
       {
           curleft += obj.offsetLeft
           obj = obj.offsetParent;
       }
   }
   else if (obj.x)
   {
       curleft += obj.x;
   }
   return curleft;
}