images_loaded=0;
    
    function load_rollovers() {
             if (document.images) {  
                rollover = new MakeArray(43)
                rollover[0].src = "images/timeline/1905_off.gif"
                rollover[1].src = "images/timeline/1905_on.gif"
                rollover[2].src = "images/timeline/1932_off.gif"
                rollover[3].src = "images/timeline/1932_on.gif"
                rollover[4].src = "images/timeline/1950_off.gif"
                rollover[5].src = "images/timeline/1950_on.gif"
                rollover[6].src = "images/timeline/1971_off.gif"
                rollover[7].src = "images/timeline/1971_on.gif"
                rollover[8].src = "images/timeline/1980_off.gif"
                rollover[9].src = "images/timeline/1980_on.gif"
                rollover[10].src = "images/timeline/1987_off.gif"
                rollover[11].src = "images/timeline/1987_on.gif"
                rollover[12].src = "images/timeline/1992_off.gif"
                rollover[13].src = "images/timeline/1992_on.gif"
                rollover[14].src = "images/timeline/1995_off.gif"
                rollover[15].src = "images/timeline/1995_on.gif"
                rollover[16].src = "images/timeline/1996_off.gif"
                rollover[17].src = "images/timeline/1996_on.gif"
                rollover[18].src = "images/timeline/1998_off.gif"
                rollover[19].src = "images/timeline/1998_on.gif"
                rollover[20].src = "images/timeline/1999_off.gif"
                rollover[21].src = "images/timeline/1999_on.gif"
                rollover[22].src = "images/timeline/2001_off.gif"
                rollover[23].src = "images/timeline/2001_on.gif"
                rollover[24].src = "images/timeline/2002_off.gif"
                rollover[25].src = "images/timeline/2002_on.gif"
                rollover[26].src = "images/timeline/2005_off.gif"
                rollover[27].src = "images/timeline/2005_on.gif"
                rollover[28].src = "images/banner.gif"
                rollover[29].src = "images/100th_banner_1905.gif"
                rollover[30].src = "images/100th_banner_1932.gif"
                rollover[31].src = "images/100th_banner_1950.gif"
                rollover[32].src = "images/100th_banner_1971.gif"
                rollover[33].src = "images/100th_banner_1980.gif"
                rollover[34].src = "images/100th_banner_1987.gif"
                rollover[35].src = "images/100th_banner_1992.gif"
                rollover[36].src = "images/100th_banner_1995.gif"
                rollover[37].src = "images/100th_banner_1996.gif"
                rollover[38].src = "images/100th_banner_1998.gif"
                rollover[39].src = "images/100th_banner_1999.gif"
                rollover[40].src = "images/100th_banner_2001.gif"
                rollover[41].src = "images/100th_banner_2002.gif"
                rollover[42].src = "images/100th_banner_2005.gif"

                
                images_loaded=1;
                                
             }
                
}



        function MakeArray(n) {
                this.length = n
                for (var i = 0; i< n; i++) {
                        this[i] = new Image()
                }
                return this
        }

   

        function chng_rollover(imgName,ro_Num) {
                if (document.images) {
                        document [imgName].src = rollover[ro_Num].src;
                }
        }