function showimage()
  { 
        var path = "http://www.csulb.edu/langlabs/language_is/";
        var names = new Array("adventure1.jpg", "adventure2.jpg", "adventure3.jpg", "discovery1.jpg", "discovery2.jpg","discovery3.jpg", "friendship1.jpg","friendship2.jpg","possibilty1.jpg", "possibilty2.jpg", "possibilty3.jpg", "possibilty4.jpg");
        
        var count = names.length;
        
        var rand_num = Math.round((count-1)*Math.random());
        
        document.image_name.src = path + names[rand_num];
}