var json;


function loadJsonDoc(url){

    new Ajax.Request(url, {
        method: 'get',
        onSuccess: function(transport){
			
            json = transport.responseText.evalJSON();
           
		  // alert(json.gal[0].imagename);
          
		  changeImage();
        }
    });
	
    
    
}



function randOrd(){
    return (Math.round(Math.random()) - 0.5);
}

function changeImage(){

    var elements;
    
        elements = json.gal;
    
       
    
    
    var imagecount = elements.length;
    var imagename = null;
    var galurl = null;
    var gals = new Array();
    
	//document.write(imagecount);
    
    
    
    //Daten aus xml einlesen und in array speichern
    for (var i = 0; i <= imagecount - 1; i++) {
        base = elements[i];
        try {
            imagename = base.imagename;
			
        } 
        catch (e) {
            imagename = ""
        }
        try {
            galurl = base.galurl;
			//alert(galurl);
        } 
        catch (e) {
            galurl = ""
        }
        
        gals[i] = new Array("imgaename", "galurl");
        gals[i]["imagename"] = imagename;
        gals[i]["galurl"] = galurl;
        //document.write(galurl);
    }
    
    gals.sort(randOrd);
    
  
    
    
    document.getElementById("videoimage1").src = "./bilder/" + gals[0]["imagename"];
    document.getElementById("videogalurl1").href = gals[0]["galurl"];
	
    document.getElementById("videoimage2").src = "./bilder/" + gals[1]["imagename"];
    document.getElementById("videogalurl2").href = gals[1]["galurl"];
	
    document.getElementById("videoimage3").src = "./bilder/" + gals[2]["imagename"];
    document.getElementById("videogalurl3").href = gals[2]["galurl"];
	
    document.getElementById("videoimage4").src = "./bilder/" + gals[3]["imagename"];
    document.getElementById("videogalurl4").href = gals[3]["galurl"]; 

    document.getElementById("videoimage5").src = "./bilder/" + gals[4]["imagename"];
    document.getElementById("videogalurl5").href = gals[4]["galurl"];
         
    
}