function show_hide(DivID1, iState) // 1 visible, 0 hidden
{	
    if(document.layers)//NN4+
    {
       document.layers[DivID1].visibility = iState ? "show" : "hide";
    }
    else if(document.getElementById)//gecko(NN6) + IE 5+
    {
        var obj = document.getElementById(DivID1);
        obj.style.visibility = iState ? "visible" : "hidden";
    }
    else if(document.all)// IE 4
    {
        document.all[DivID1].style.visibility = iState ? "visible" : "hidden";
    }
}