//imagePointer = 0;

function displayImageModule()
{
	var div = document.getElementById('_imageModule');
	changeOpac(0, "imageShown");
	div.style.display = "block";
	showPopUp();
}

function hideImageModule()
{
	/*var div2 = document.getElementById('imageShown');
		
	var speed = Math.round(500 / 100);
    var timer = 0;
	
    for(i = 100; i >= 0; i--) 
    {
        setTimeout("changeOpac(" + i + ",'imageShown')",(timer * speed));
    	timer++;
    }
    
    setTimeout("closeModule()", 500);*/
    
    closeModule();
}


function closeModule()
{
	var div = document.getElementById('_imageModule');
	div.style.display = "none";
	
	imagePointer = 0;
	var object = document.getElementById("imageShown").innerHTML = "<img src='images/centers/" + imageArray[imagePointer] + "' border='0' />";
	
}

function showPopUp()
{
		var object = document.getElementById("nextButton").style;
		if (imageTotal > 1)
		{
			object.display = "block";
		}
	//var xDiv = document.getElementById('imageShown');
	//xDiv.style.display = 'block';
	
	changeOpac(0, "imageShown");
	
	opacity("imageShown", 0, 100, 500);
	
	//var reddir = setTimeout("redirect()", 10000);
}

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 nextImage()
{
	var object = document.getElementById("previousButton").style;
	object.display = "block";
	
	
	if (imagePointer <  imageTotal)
	{
		if (imagePointer == (imageTotal - 2))
		{
			var object = document.getElementById("nextButton").style;
			object.display = "none";
		}
		
		imagePointer++;
		var object = document.getElementById("imageShown").innerHTML = "<img src='images/centers/" + imageArray[imagePointer] + "' border='0' />";		
	}	
}

function prevImage()
{
	if (imagePointer == 1)
	{
		var object = document.getElementById("previousButton").style;
		object.display = "none";
	}
	
	if (imagePointer > 0)
	{
		imagePointer--;		
		var object = document.getElementById("imageShown").innerHTML = "<img src='images/centers/" + imageArray[imagePointer] + "' border='0' />";
		
		var object = document.getElementById("nextButton").style;
		object.display = "block";
	}
}