function slideshow()
{
	if(images.length == 0)
	{
		return;
	}
	
	var i = 0;
	
	changePic();    //set initial picture
    
    setInterval("changePic()", 5000);
}

function changePic()
{
	if(current == -1)
	{
		current = 0;
	}
	else
	{
		//we don't want to fade in the initial image
    	setTimeout("opacity('slideshow', 0, 100, " + fade_speed + ")", 0);
    }
    
    document.getElementById('slideshow').src = images[current].src;
    
    current ++;
    
    if(current > images.length-1)
    {
        current = 0;
    }    
    
    setTimeout("opacity('slideshow', 100, 0, " + fade_speed + ")", 3000);
}

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 + ")";
}