function preload() {
    if (!document.images) {
        return;
    }

    var ar = new Array();
    var arguments = preload.arguments;

    for (var i=0; i<arguments.length; i++) {
        ar[i] = new Image();
        ar[i].src = arguments[i];
    }
}

function openKontakt(type)
{
	if (type == "Catering")
	{
		if (screen.availHeight < 900)
		{
			MeinFenster = window.open("/kontakt/index.php?type=catering", "Cateringanfrage", "width=620,height="+screen.availHeight+",scrollbars=yes,resize=true");
		}
		else
		{
			MeinFenster = window.open("/kontakt/index.php?type=catering", "Cateringanfrage", "width=600,height=900,scrollbars=no");
		}
 		MeinFenster.focus();
	}
	else
	{
		MeinFenster = window.open("/kontakt/index.php", "Kontakt", "width=600,height=700,scrollbars=no");
 		MeinFenster.focus();		
	}
}

function highlightNavi()
{
	var nav_links = document.getElementById('header').getElementsByTagName('h1');
	
	for (var i=0; i<nav_links.length; i++)
	{
		var img_src = nav_links[i].getElementsByTagName('img')[0].src;
		var status = img_src.substr(-7,7);
		var active;
		if (status=="_hl.png")
		{
			active = 1;
		} 
		else 
		{
			active = 0;
			nav_links[i].onmouseover = function() 
			{
				var old_img_src = this.getElementsByTagName('img')[0].src;
				patt = /_hl.png/;
				result = patt.test(old_img_src);
				if (result==false)
				{
					var new_img_src = old_img_src.split(".png");
					new_img_src = new_img_src[0] + "_hl.png";
					this.getElementsByTagName('img')[0].src = new_img_src;
				}
			}

			nav_links[i].onmouseout = function() 
			{
				var old_img_src = this.getElementsByTagName('img')[0].src;
				patt = /_hl.png/;
				result = patt.test(old_img_src)				
				if (result==true)
				{
					var new_img_src = old_img_src.split("_hl.png");
					new_img_src = new_img_src[0] + ".png";
					this.getElementsByTagName('img')[0].src = new_img_src;
				}
			}						
		}
	
	}
}