ns4 = (document.layers) ? true : false
ie4 = (document.all) ? true : false
StdDOM = (document.getElementById) ? true : false

// Show/Hide functions for non-pointer layer/objects
function show(ObjId) {
		 if (StdDOM) document.getElementById(ObjId).style.visibility = "visible"
        else if (ns4) document.layers[ObjId].visibility = "show"
        else if (ie4) document.all[ObjId].style.visibility = 'visible';}

function hide(ObjId) {
        if (ns4) document.layers[ObjId].visibility = "hide"
        else if (ie4) document.all[ObjId].style.visibility = 'hidden'
        else if (StdDOM) document.getElementById(ObjId).style.visibility = "hidden";}