function display_random_image() {
var number = 6;
var imagearray = new Array(number);
var random_number="";
var image="";
jran = Math.random();
random_number = Math.round(jran *(number-1));
imagearray[0]="images/index_zdjecie01.jpg";
imagearray[1]="images/index_zdjecie02.jpg";
imagearray[2]="images/index_zdjecie03.jpg";
imagearray[3]="images/index_zdjecie04.jpg";
imagearray[4]="images/index_zdjecie05.jpg";
imagearray[5]="images/index_zdjecie06.jpg";
image=imagearray[random_number];
document.write("<img src='" +image+ "'");
document.write("WIDTH=431 HEIGHT=149 border=0>");
}