function showlayer(szDivID, iState) 
{
    if(document.layers)	   
    {
       document.layers[szDivID].visibility = iState ? "show" : "hide";
    }
    else if(document.getElementById)	  
    {
        var obj = document.getElementById(szDivID);
        obj.style.visibility = iState ? "visible" : "hidden";
    }
    else if(document.all)	
    {
        document.all[szDivID].style.visibility = iState ? "visible" : "hidden";
    }
}