if(!exclude){

 var available_height, available_width;
 if(ie4||ie5||ie6){
  available_width = document.body.clientWidth;
  available_height = document.body.clientHeight;
 }
 if(ns4||ns6||op5||op6||mz7){
  available_height = window.innerHeight;
  available_width = window.innerWidth;
 }

 var imagebg = '<img src="../img/bgmain.jpg" width="' + available_width + '" height="' + available_height + '" alt=""><br>';
 document.write(imagebg);
 document.write('</div>');
 var bodyLayer = '<div id="mainLayer" style="position:absolute; width:' + available_width + 'px; height:' + available_height + 'px; z-index:2; left: 0px; top: 0; visibility: visible">';
 document.write(bodyLayer);

}