var timer = "";
var openMenu = null;
var canMenuBeClosed = true;

function clearTimer(){
	window.clearTimeout(timer);
}

function tryToClose(){
	var funcToCall = "canMenuBeClosed = true"
	timer = window.setTimeout(funcToCall, 400);
}

function showMenu(id, objPos){

	if(document.getElementById){
		clearTimer();
		setElementProperty('menuitem1', 'display', 'none');
		setElementProperty('menuitem2', 'display', 'none');
		setElementProperty('menuitem3', 'display', 'none');
		setElementProperty('menuitem4', 'display', 'none');
		setElementProperty('menuitem5', 'display', 'none');
		setElementProperty('menuitem6', 'display', 'none');
		setElementProperty('menuitem7', 'display', 'none');
		setElementProperty('menuitem8', 'display', 'none');
		openMenu = id;
		canMenuBeClosed = false

		var x = 0;
		var y = 0;

		x = getElementLeft(objPos);
		y = getElementBottom(objPos);

		/*if(!window.event){
			y-=1;
		}*/

		setElementProperty(id, 'display', 'block');
		setElementProperty(id, 'left', x + "px");
		setElementProperty(id, 'top', y + "px");
		showHideLayers('pulldown1','','hide');
		showHideLayers('pulldown2','','hide');
		showHideLayers('pulldown3','','hide');
		showHideLayers('pulldown4','','hide');
	}
}

function hideMenu(id){
	setElementProperty(id, 'display', 'none');
	openMenu = null;
	showHideLayers('pulldown1','','show');
	showHideLayers('pulldown2','','show');
	showHideLayers('pulldown3','','show');
	showHideLayers('pulldown4','','show');
	MM_swapImgRestore();
}

function getMousePos(event){
	var x, y;

	if(window.event){
		x = window.event.clientX;
		y = window.event.clientY;
		if (document.documentElement && document.documentElement.scrollTop){
			y+=document.documentElement.scrollTop;

		} else {
			y+=document.body.scrollTop;

		}
	} else {
		x = event.pageX;
		y = event.pageY;
	}

	if(openMenu != null){
		var testInside = isInside(x, y, openMenu);
		if(!testInside && canMenuBeClosed == true){
			hideMenu(openMenu);
		}
		if(testInside){
			canMenuBeClosed = true;
			clearTimer();
		}
	}
}

function isInside(xMouse, yMouse, id){
	if( (id != null) && (xMouse >= getElementLeft(id)) && (xMouse <=getElementRight(id)) && (yMouse >= (getElementTop(id))-25) && (yMouse <= getElementBottom(id)) ){
		return true;
	} else {
		return false;
	}
}

window.onload = function() {
	document.onmousemove = getMousePos;
	MM_preloadImages('/images/about-over.gif','/images/action-over.gif','/images/build-over.gif','/images/contact-over.gif','/images/home-over.gif','/images/howner-over.gif','/images/involve-over.gif', '/images/sponsor-over.gif');
}

/*
* ITA: funzione che cambia la proprietà display di un elemento
* ENG: This function change the property display of an element
*/

function switchDisplay(elm){
	var elm = elm.parentNode.nextSibling;
	while(elm.nodeType == 3){
		elm = elm.nextSibling;
	}

	var elmStyle = getElementProperty(elm, "display")

	if((elmStyle == "none") || (elmStyle == "") || (elmStyle == null)){
		setElementProperty(elm, "display", "block");
		return;
	}
	if(elmStyle == "block"){
		setElementProperty(elm, "display", "none");
		return;
	}
}

function MM_preloadImages() { //v3.0
  var d=document; if(d.images){ if(!d.MM_p) d.MM_p=new Array();
    var i,j=d.MM_p.length,a=MM_preloadImages.arguments; for(i=0; i<a.length; i++)
    if (a[i].indexOf("#")!=0){ d.MM_p[j]=new Image; d.MM_p[j++].src=a[i];}}
}

function MM_findObj(n, d) { //v4.01
  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);
  if(!x && d.getElementById) x=d.getElementById(n); return x;
}

function showHideLayers() { //v6.0
  var i,p,v,obj,args=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 displayLayers() {
  var i,p,v,obj,args=displayLayers.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=='block')?'block':(v=='none')?'none':v; }
	obj.display=v; }
}

function MM_swapImage() { //v3.0
  var i,j=0,x,a=MM_swapImage.arguments; document.MM_sr=new Array; for(i=0;i<(a.length-2);i+=3)
   if ((x=MM_findObj(a[i]))!=null){document.MM_sr[j++]=x; if(!x.oSrc) x.oSrc=x.src; x.src=a[i+2];}
}

function MM_swapImgRestore() { //v3.0
  var i,x,a=document.MM_sr; for(i=0;a&&i<a.length&&(x=a[i])&&x.oSrc;i++) x.src=x.oSrc;
}