function MoveLeft()
{
	index=pointer;
	index=GetNextIndex(index,"left");
	document.getElementById("image1").src="GetComponent.aspx?c="+image[index].Imagel;
	//currentOpac("image1",5);
	index=GetNextIndex(index,"left");
	//shiftOpacity("image2",5);
	document.getElementById("image2").src="GetComponent.aspx?c="+image[index].Imagel;
	index=GetNextIndex(index,"left");
	//shiftOpacity("imagetop",5);
	document.getElementById("imagetop").src="GetComponent.aspx?c="+image[index].Imagem;
	document.getElementById("IntroText").innerHTML=image[index].IntroText;
	index=GetNextIndex(index,"left");
	//shiftOpacity("image3",5);
	document.getElementById("image3").src="GetComponent.aspx?c="+image[index].Imager;
	index=GetNextIndex(index,"left");
	//shiftOpacity("image4",5);
	document.getElementById("image4").src="GetComponent.aspx?c="+image[index].Imager;
	pointer=GetNextIndex(pointer,"left");
}

function MoveRight()
{
	index=pointer;	
	index=GetNextIndex(index,"right");
	document.getElementById("image1").src="GetComponent.aspx?c="+image[index].Imagel;
	index=GetNextIndex(index,"left");
	document.getElementById("image2").src="GetComponent.aspx?c="+image[index].Imagel;
	index=GetNextIndex(index,"left");
	document.getElementById("imagetop").src="GetComponent.aspx?c="+image[index].Imagem;
	document.getElementById("IntroText").innerHTML=image[index].IntroText;
	index=GetNextIndex(index,"left");
	document.getElementById("image3").src="GetComponent.aspx?c="+image[index].Imager;
	index=GetNextIndex(index,"left");
	document.getElementById("image4").src="GetComponent.aspx?c="+image[index].Imager;
	pointer=GetNextIndex(pointer,"right");
}

function GetNextIndex(index,direction)
{
	if(direction=="left")
	{
		index++;
		if(index==23)
		{
			index=0;
		}
	}
	else if(direction=="right")
	{
		index--;
		if(index==-1)
		{
			index=22;
		}
	}
	return index;
}


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 encodeMyHtml()
{
     encodedHtml = escape(encodeHtml.htmlToEncode.value);
     encodedHtml = encodedHtml.replace(/\//g,"%2F");
     encodedHtml = encodedHtml.replace(/\?/g,"%3F");
     encodedHtml = encodedHtml.replace(/=/g,"%3D");
     encodedHtml = encodedHtml.replace(/&/g,"%26");
     encodedHtml = encodedHtml.replace(/@/g,"%40");
     encodeHtml.htmlEncoded.value = encodedHtml;
  }