if (navigator.appName == "Netscape") {
	layerRef="document.layers";
  	styleSwitch="";
	nscape=1;
    } else {
    	layerRef="document.all";
    	styleSwitch=".style";
		nscape=0;
    }

function showLayer(layerName) {
 	eval(layerRef+'["'+layerName+'"]'+styleSwitch+'.visibility="visible"');
}
  	
function hideLayer(layerName) {
	eval(layerRef+'["'+layerName+'"]'+styleSwitch+'.visibility="hidden"');
}

var interval1;
function mouse_out(dropdownmenu){
	interval1=window.setInterval("hideLayer('"+dropdownmenu+"')", 500);
}

function mouse_over(dropdownmenu){
	window.clearInterval(interval1);
	showLayer(dropdownmenu);
	for(i=1; i<6; i++){
		if (dropdownmenu != "menu"+i)
			hideLayer("menu"+i);
	}

}