//detecting mouse objects
var ns=(document.layers)
var ie=(document.all)

//show the layer when mouseover
function sign(el,c) {
if (ns){
        document.layers["child"+c].visibility="show";
		}else{
		document.all["child"+c].style.visibility="visible";
		}

}
//hide the layer when mouseout
function hide(c) {
        if (ns){
        document.layers["child"+c].visibility="hide";
		}else{
		document.all["child"+c].style.visibility="hidden";
		} 
}