var fade_objects = new Array('fragment-1', 'fragment-2', 'fragment-3');
var fadetime = 1300;
var rotatetime = 8000;
var cur = 0;

function rotate(){
	fadeOut(fade_objects[cur]);
	if((cur+1) > (fade_objects.length-1)){
		cur = 0;
	}
	else{
		cur++;
	}
	fadeIn(fade_objects[cur]);
	setTimeout("rotate()", rotatetime);
}

function fadeIn(id){
	try{
		opacity(id, 0, 100, fadetime);
	}
	catch(e){
		
	}
}

function fadeOut(id){
	try{
		opacity(id, 100, 0, fadetime);
	}
	catch(e){
	}
}

function opacity(id, opacStart, opacEnd, millisec) {
	document.getElementById(id).style.display = "block";
    var speed = Math.round(millisec / 100);
    var timer = 0;

    if(opacStart > opacEnd) {
        for(i = opacStart; i >= opacEnd; i--) {
            setTimeout("changeOpac(" + i + ",'" + id + "')",(timer * speed));
            timer++;
        }
		document.getElementById(id).style.display = "none";
    } 
	else if(opacStart < opacEnd) {
		changeOpac(0,id);
		for(var i = opacStart; i <= opacEnd; i++){
			setTimeout("changeOpac(" + i + ",'" + id + "')",(timer * speed));
			timer++;
		}
	}
}

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 + ")";
	if(opacity == 100){
		object.filter = "";
	}
}