try{document.execCommand('BackgroundImageCache', false, true);}catch(e){}
function shht(id){el1 = document.getElementById(id);el2 = document.getElementById(id+'_hidden');if(el1.style.display==''){el1.style.display='none';el2.style.display='';}else{el1.style.display='';el2.style.display='none';}return false;}