img_array = [];
img_array[0] = new Image();
img_array[1] = new Image();
img_array[2] = new Image();
img_array[3] = new Image();
img_array[4] = new Image();
img_array[0].src = "index/back_1.jpg";
img_array[1].src = "index/back_2.jpg";
img_array[2].src = "index/back_3.jpg";
img_array[3].src = "index/back_4.jpg";
img_array[4].src = "index/back_5.jpg";


function get_img( num) {
    $( "#main_switcher_photo").style.backgroundImage = "url( "+ img_array[num].src +")";
    left_text_array = $( "#main_switcher_photo .main_switcher_left");
    for ( var i in left_text_array ) {
        if ( left_text_array[i] == $( "#left_text_" + num) ) {
            left_text_array[i].style.display = "block";
        } else {
            left_text_array[i].style.display = "none";
        }
    }
}