function MM_preloadImages() { //v3.0
  var d=document; if(d.images){ if(!d.MM_p) d.MM_p=new Array();
    var i,j=d.MM_p.length,a=MM_preloadImages.arguments; for(i=0; i<a.length; i++)
    if (a[i].indexOf("#")!=0){ d.MM_p[j]=new Image; d.MM_p[j++].src=a[i];}}
}
function hidedriver()
{
  if (document.getElementById("extra_driver"))
  {
     document.getElementById("extra_driver").style.display = "none";
     document.forms[0].additional[0].checked = true;
  }
}
function hideLayer()
{
     document.getElementById("extra_driver").style.display = "none";
}
function showLayer()
{ 
     document.getElementById("extra_driver").style.display = "block";
}