function ActivePanel(Tab,Layer,Num)
    {
            for (i=1;i<Num+1;i++){
                document.all("Tab"+i).background = "/images/tab.gif";
         		document.all("Layer"+i).style.visibility = "hidden";
            	document.all("Layer"+i).style.display = "none";                  	
            }
            document.all(Tab).background = "/images/tab_select.gif";
            document.all(Layer).style.visibility = "visible";
            document.all(Layer).style.display = "block";
    }