var menustat=new Array();
var menuheight=new Array();
 
function opacity(id, opacStart, opacEnd, millisec) {
	//speed for each frame
	var speed = Math.round(millisec / 100);
	var timer = 0;

	//determine the direction for the blending, if start and end are the same nothing happens
	if(opacStart > opacEnd) {
		for(i = opacStart; i >= opacEnd; i--) {
			setTimeout("changeOpac(" + i + ",'" + id + "')",(timer * speed));
			timer++;
		}
	} else if(opacStart < opacEnd) {
		for(i = opacStart; i <= opacEnd; i++)
			{
			setTimeout("changeOpac(" + i + ",'" + id + "')",(timer * speed));
			timer++;
		}
	}
}

//change the opacity for different browsers
function changeOpac(opacity, id) {
	var object = document.getElementById(id).style; 
	object.opacity = (opacity / 100);
	object.MozOpacity = (opacity / 100);
	object.KhtmlOpacity = (opacity / 100);
	object.filter = "alpha(opacity=" + opacity + ")";
}

function shiftOpacity(id, millisec) {
	//if an element is invisible, make it visible, else make it ivisible
	if(document.getElementById(id).style.opacity == 0) {
		opacity(id, 0, 100, millisec);
	} else {
		opacity(id, 100, 0, millisec);
	}
}

function blendimage(divid, imageid, imagefile, millisec) {
	var speed = Math.round(millisec / 100);
	var timer = 0;
	
	//set the current image as background
	document.getElementById(divid).style.backgroundImage = "url(" + document.getElementById(imageid).src + ")";
	
	//make image transparent
	changeOpac(0, imageid);
	
	//make new image
	document.getElementById(imageid).src = imagefile;

	//fade in image
	for(i = 0; i <= 100; i++) {
		setTimeout("changeOpac(" + i + ",'" + imageid + "')",(timer * speed));
		timer++;
	}
}

function currentOpac(id, opacEnd, millisec) {
	//standard opacity is 100
	var currentOpac = 100;

	//if the element has an opacity set, get it
	if(document.getElementById(id).style.opacity < 100) {
		currentOpac = document.getElementById(id).style.opacity * 100;
	}

	//call for the function that changes the opacity
	opacity(id, currentOpac, opacEnd, millisec)
}

function ShowDiv (id) {
    var t=document.getElementById(id).style.height;
    menustat[id]=1;
    //  setTimeout("ShowDivStat('"+id+"')",0);
    currentOpac(id, 100, 5);
    document.getElementById(id).style.height='auto';
    document.getElementById(id).style.visibility='visible';
	document.getElementById(id).style.zIndex='5';
}
function ShowDivStat(id) {
    menustat[id]=1;
}

function HideDiv (id) {
    menustat[id]=0;
    setTimeout("HideDivReally('"+id+"')",1000);
    menuheight[id] = document.getElementById(id).style.height
	document.getElementById(id).style.zIndex='4';
}
function HideDivReally (id) {
    if (menustat[id]==0) {
	currentOpac(id, 0, 5);
	setTimeout("HideDivZ('"+id+"')",590);
    }
}

function HideDivZ (id) {
    document.getElementById(id).style.height='0px';
    document.getElementById(id).style.overflow='hidden';
}