function changeDDon(menuImg) {
   if (document.getElementById) {
       if (menuImg == "dd_employers") {
           document.getElementById(menuImg).src = "images/dropdown/employersOn.gif";
       }
       if (menuImg == "dd_seekers") {
           document.getElementById(menuImg).src = "images/dropdown/jobseekersOn.gif";
       }
   }
}
function changeDDoff(menuImg) {
   if (document.getElementById) {
       if (menuImg == "dd_employers") {
           document.getElementById(menuImg).src = "images/dropdown/employers.gif";
       }
       if (menuImg == "dd_seekers") {
           document.getElementById(menuImg).src = "images/dropdown/jobseekers.gif";
       }
   }
} 

function showDropdown(menu) {
	if (document.getElementById) {
		document.getElementById(menu).style.visibility = "visible";
	}
}
function hideDropdown(menu) {
	if (document.getElementById) {
		document.getElementById(menu).style.visibility = "hidden";
	}
}


function opacityChange(opacity, thediv, theimage) {
	var object = document.getElementById(thediv).style;
	if (opacity == 100) {
		object.opacity = 0;
		object.MozOpacity = 0;
		object.KhtmlOpacity = 0;
		object.filter = "alpha(opacity=0)";
		document.getElementById(theimage).style.backgroundImage = "url(" + document.getElementById(thediv).src + ")";
	}
	else {
		object.opacity = (opacity/100);
		object.MozOpacity = (opacity/100);
		object.KhtmlOpacity = (opacity/100);
		object.filter = "alpha(opacity=" + opacity + ")";
	}
}


function imageFade(thediv, theimage, imageloc, time) {
	var speed = Math.round(time / 10);
	var timer = 0;
	opacityChange(0, theimage);
	document.getElementById(theimage).src = imageloc;
	for(i = 0; i <= 100; i++) {
		setTimeout("opacityChange(" + i + ",'" + theimage + "','" + thediv + "')",(timer * speed));
		timer++;
	}
}

var slideCache = new Array();

function RunSlideShow(thediv,theimage,imageFiles,displaySecs) {
	var imageSeparator = imageFiles.indexOf(";");
	var nextImage = imageFiles.substring(0,imageSeparator);
	imageFade(thediv,theimage,nextImage,100);
	var nextImages= imageFiles.substring(imageSeparator+1,imageFiles.length)+ ';' + nextImage;
	setTimeout("RunSlideShow('"+thediv+"','"+theimage+"','"+nextImages+"',"+displaySecs+")",displaySecs*1000);

	imageSeparator = nextImages.indexOf(";");
	nextImage = nextImages.substring(0,imageSeparator);
	if (slideCache[nextImage] == null) {
		slideCache[nextImage] = new Image;
		slideCache[nextImage].src = nextImage;
	}
}