var TimerID;

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


var agt = navigator.userAgent.toLowerCase();

var isMac  = (agt.indexOf("mac") != -1);
var isIE5  = (agt.indexOf("msie 5") != -1);
var IE5Mac = (isMac && isIE5);
var NS6    = (navigator.appVersion.substring(0, 1) == "5" && navigator.appName == "Netscape");
var NS4    = (document.layers) ? 1 : 0;    
var IE4    = (document.all) ? 1 : 0;

/*
var varString = "";
varString += "isMac=" + isMac;
varString += "&isIE5 = " + isIE5;
varString += "&IE5Mac = " + IE5Mac;
varString += "&NS6 = " + NS6;
varString += "&NS4 = " + NS4;
varString += "&IE4 = " + IE4;
alert(varString);
*/

function MM_findObj(n, d) { //v3.0
  var p,i,x;  if(!d) d=document; if((p=n.indexOf("?"))>0&&parent.frames.length) {
    d=parent.frames[n.substring(p+1)].document; n=n.substring(0,p);}
  if(!(x=d[n])&&d.all) x=d.all[n]; for (i=0;!x&&i<d.forms.length;i++) x=d.forms[i][n];
  for(i=0;!x&&d.layers&&i<d.layers.length;i++) x=MM_findObj(n,d.layers[i].document); return x;
}

function MM_showHideLayers() { //v3.0
  var i,p,v,obj,args=MM_showHideLayers.arguments;
  for (i=0; i<(args.length-2); i+=3) if ((obj=MM_findObj(args[i]))!=null) { v=args[i+2];
    if (obj.style) { obj=obj.style; v=(v=='show')?'visible':(v='hide')?'hidden':v; }
    obj.visibility=v; }
}

function closeMenu(M) {
	TimerID = setTimeout("MM_showHideLayers('" + M + "','','hide');", 1000);
}

function openMenu(M) {
	self.clearTimeout(TimerID);
	closeAllMenus(M);
	TimerID = self.setTimeout("MM_showHideLayers('" + M + "','','show');");	
}

function closeAllMenus(M) {
	if (M != 'Menu1') MM_showHideLayers('Menu1','','hide');
	if (M != 'Menu2') MM_showHideLayers('Menu2','','hide');
	if (M != 'Menu3') MM_showHideLayers('Menu3','','hide');
	if (M != 'Menu4') MM_showHideLayers('Menu4','','hide');
	if (M != 'Menu5') MM_showHideLayers('Menu5','','hide');
}