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 openLink(link)
{
	setTimeout("self.location="+link, 5000); // 200 Milliseconds
	setTimeout(window.location.href(link), 5000); // 200 Milliseconds
}

sfHover = function() {
	var sfOpac = document.getElementById("contentframe");
	var sfEls = document.getElementById("nav").getElementsByTagName("LI");
	for (var i=0; i<sfEls.length; i++) {
		sfEls[i].onmouseover=function() {
			this.className+=" sfhover";
		}
		sfEls[i].onmouseout=function() {
			this.className=this.className.replace(new RegExp(" sfhover\\b"), "");
		}
		sfEls[i].onclick=function() {
			opacity("contentfront",100,0,100);
			/*opacity("contentback",50,0,100);*/
		}
	}
	var sfEls2 = document.getElementById("main-navigation").getElementsByTagName("span");
	for (var i=0; i<sfEls.length; i++) {
		sfEls2[i].onmouseover=function() {
			this.className+=" sfhover";
		}
		sfEls2[i].onmouseout=function() {
			this.className=this.className.replace(new RegExp(" sfhover\\b"), "");
		}
		sfEls2[i].onclick=function() {
			opacity("contentfront",100,0,100);
			/*opacity("contentback",50,0,100);*/
		}
	}
	var sfLinks = document.links;
	for (var i=0; i<sfLinks.length; i++) {
		sfLinks[i].href="javascript:openLink('" + sfLinks[i].href + "');";
	}
}
/*opacity("contentfront",0,100,1800);
opacity("contentback",0,50,1800);*/
/*opacity("cms",0,100,1800);*/
/*opacity("contentframe",0,100,900);*/
opacity("contentfront",0,100,1800);
/*setTimeout("window.location.reload()", 5000);*/
if (window.attachEvent) window.attachEvent("onload", sfHover);