br=navigator.appName; //browser type

function setVisible(object,choice){
 if(document.all){ //for IE
   eval('document.all.'+object+'.style.visibility=\''+choice+'\';');
 }
 if(document.getElementById) { //for firefox
   eval('document.getElementById("'+object+'").style.visibility=\''+choice+'\';');
 }
 if(document.layers) { //for netscape
   eval('document.layers["'+object+'"].visibility=\''+choice+'\';');
 }
}