var activeImage = 1;

function isIE()
{
  return /msie/i.test(navigator.userAgent) && !/opera/i.test(navigator.userAgent);
}

var changeImage = function(num)
{
    bigLink(num);
    document.getElementById('image').src = "../images/projekte/"+imageDir+"/"+num+".jpg";
    
    if(isIE() != true)
    {
        document.getElementById("l"+activeImage).style.removeProperty("color");
        document.getElementById("l"+num).style.setProperty("color", "#218497","");
    }
    else
    {
        document.getElementById("l"+activeImage).style.removeAttribute("color");
        document.getElementById("l"+num).style.setAttribute("color", "#218497","");
    }
    
    activeImage = num;
};

var bigLink = function(num)
{
    if(activeImage < (totalImages - 1) && num < totalImages)
    {
	document.getElementById('main').innerHTML = '<a href="#" onclick="changeImage('+(num+1)+')"><img src="" alt="" id="image" /></a>';
    }
    else
    {
	document.getElementById('main').innerHTML = '<img src="" alt="" id="image" />';
    }
}

bigLink(activeImage);
changeImage(activeImage);