ie4=(document.all)?true:false;
    ns4=(document.layers)?true:false;
    function toExit(){
    var args=toExit.arguments;
    var visible=args[0];
    if(ns4){
            theObj=eval("document.layers[\'"+args[1]+"\']");
            if(theObj)theObj.visibility=visible;
            }
    else if(ie4){
            if(visible=='show')visible='visible';
            if(visible=='hide')visible='hidden';
            theObj=eval("document.all[\'"+args[1]+"\']");
            if(theObj)theObj.style.visibility=visible;
            }
    }