function Image_Effects()
{
	this.opacity = opacity;
	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
	this.ChangeOpac = ChangeOpac;
	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 + ")";
	}

	this.shiftOpacity = shiftOpacity;
	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);
		}
	}
	
	this.RotateImages = RotateImages;
	function RotateImages(imgImage, fadeTime, showTime)
	{
		if (arrRotateImages.length == 0) return;
	
		var intImage1 = intRotateCurrentImage;
		var intImage2 = intRotateCurrentImage + 1;
		
		if (intImage2 >= arrRotateImages.length)
		{
			intImage2 = 0;
			intRotateCurrentImage = 0;
		}
		intRotateCurrentImage++;

		ImageEffects.Blendimage(imgImage, imgImage + "2", arrRotateImages[intImage1], arrRotateImages[intImage2], fadeTime);
		setTimeout("ImageEffects.RotateImages('" + imgImage + "', " + fadeTime + ", " + showTime + ")", showTime);

	}

	this.Blendimage = Blendimage;
	function Blendimage(divid, imageid, imagefile1, imagefile2, millisec) 
	{
		var speed = Math.round(millisec / 100);
		var timer = 0;

		//set the current image as background
		GetElement(divid).src = imagefile1;
		
		//make image transparent
		ChangeOpac(0, imageid);
		
		//make new image
		GetElement(imageid).src = imagefile2;

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

	this.currentOpac = currentOpac;
	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)
	}
}