window.onload = l_off;
window.onunload = l_on;
function l_off()
{
   this.document.getElementById("loaderContainer").style.display = "none";
   return true;
}
function l_on()
{
   var o_set = this.document.getElementById('loaderContainerWH');
   var o_getH = this.document.getElementsByTagName('body')[0];
   o_set.style.height = o_getH.scrollHeight;
   this.document.getElementById("loaderContainer").style.display = "";
   return true;
}