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 slideshow(slideshowname) {

    var logos = new Array();
    var tinfo = new Array();
    var max = 0;
    var cnt;
    var index = 0;

    this.name = slideshowname;
    this.timeout = 5000;
    this.timeoutid = 0;


    this.play = function(timeout) {
    
        //alert(document.getElementById("lblTournNum").innerHTML);

        cnt = document.getElementById("lblTournNum").innerHTML;
        max = parseInt(cnt);

        if (this.index == null) {
            this.index = 0;
            document.getElementById("imgTourn").src = this.logos[this.index];
            document.getElementById("lblTournDetails").innerHTML = this.tinfo[this.index];
        }

        this.pause();

        if (timeout) {
            this.timeout = timeout;
        }
        this.timeoutid = setTimeout(this.name + ".hide()", 8000);
    }

    this.pause = function() {

        if (this.timeoutid != 0) {
            clearTimeout(this.timeoutid);
            this.timeoutid = 0;
        }
    }

    this.hide = function() {
        opacity('blenddiv', 100, 0, 500);
        setTimeout(this.name + ".switchImg()", 500);

    }
    
    this.switchImg = function() {
    if (this.index < max)
            this.index += 1;
        else
            this.index = 0;

        document.getElementById("imgTourn").src = this.logos[this.index];
        document.getElementById("lblTournDetails").innerHTML = this.tinfo[this.index];
        setTimeout(this.name + ".show()", 500);
    }

    this.show = function() {

        
        opacity('blenddiv', 0, 100, 500);
        this.play();
    }

}