var images = ["images/plz/a.png",
              "images/plz/ch.png",
              "images/plz/plz_0.png",
              "images/plz/plz_1.png",
              "images/plz/plz_2.png",
              "images/plz/plz_3.png",
              "images/plz/plz_35_36.png",
              "images/plz/plz_4.png",
              "images/plz/plz_5.png",
              "images/plz/plz_58_59.png",
              "images/plz/plz_6.png",
              "images/plz/plz_7.png",
              "images/plz/plz_8.png",
              "images/plz/plz_9.png"
            ];

$(document).ready(function(){

    imagesPreload(images);
  
    $('area').each(function(){

        var tmp = $(this).attr('id');
       
        $(this).mouseover(function(){

            $("#dieKarte_rep").attr("src","images/plz/"+tmp+".png").show();
            
        });

        $(this).mouseleave(function(){                        
            $("#dieKarte_rep").hide();
        });

    });


});


function imagesPreload(images){

    var cache = [];
    var args_len = images.length;

    for (var i = args_len; i--;) {

        var cacheImage = document.createElement('img');
        cacheImage.src = images[i];
        cache.push(cacheImage);
    }

}