images_loaded=0;
    
    function load_rollovers() {
             if (document.images) {  
                rollover = new MakeArray(34)
                rollover[0].src = "/images/newportfolio/portfolio_residential_off.gif"
                rollover[1].src = "/images/newportfolio/portfolio_residential_on.gif"
                rollover[2].src = "/images/newportfolio/portfolio_retail_off.gif"
                rollover[3].src = "/images/newportfolio/portfolio_retail_on.gif"
                rollover[4].src = "/images/newportfolio/portfolio_entertainment_off.gif"
                rollover[5].src = "/images/newportfolio/portfolio_entertainment_on.gif"
                rollover[6].src = "/images/newportfolio/portfolio_office_off.gif"
                rollover[7].src = "/images/newportfolio/portfolio_office_on.gif"
                rollover[8].src = "/images/newportfolio/portfolio_college_off.gif"
                rollover[9].src = "/images/newportfolio/portfolio_college_on.gif"
                rollover[10].src = "/images/newportfolio/portfolio_hospital_off.gif"
                rollover[11].src = "/images/newportfolio/portfolio_hospital_on.gif"
                rollover[12].src = "/images/newportfolio/portfolio_religious_off.gif"
                rollover[13].src = "/images/newportfolio/portfolio_religious_on.gif"
                rollover[14].src = "/images/newportfolio/portfolio_utilities_off.gif"
                rollover[15].src = "/images/newportfolio/portfolio_utilities_on.gif"
                rollover[16].src = "/images/newportfolio/portfolio_parking_off.gif"
                rollover[17].src = "/images/newportfolio/portfolio_parking_on.gif"
                rollover[18].src = "/images/newportfolio/portfolio_roads_off.gif"
                rollover[19].src = "/images/newportfolio/portfolio_roads_on.gif"
                rollover[20].src = "/images/newportfolio/portfolio_transit_off.gif"
                rollover[21].src = "/images/newportfolio/portfolio_transit_on.gif"
                rollover[22].src = "/images/newportfolio/portfolio_parks_off.gif"
                rollover[23].src = "/images/newportfolio/portfolio_parks_on.gif"
                rollover[24].src = "/images/newportfolio/portfolio_stormwater_off.gif"
                rollover[25].src = "/images/newportfolio/portfolio_stormwater_on.gif"
                rollover[26].src = "/images/newportfolio/portfolio_streetscapes_off.gif"
                rollover[27].src = "/images/newportfolio/portfolio_streetscapes_on.gif"
                rollover[28].src = "/images/newportfolio/portfolio_sidewalks_off.gif"
                rollover[29].src = "/images/newportfolio/portfolio_sidewalks_on.gif"
                rollover[30].src = "/images/newportfolio/portfolio_public_off.gif"
                rollover[31].src = "/images/newportfolio/portfolio_public_on.gif"
                rollover[32].src = "/images/newportfolio/portfolio_planning_off.gif"
                rollover[33].src = "/images/newportfolio/portfolio_planning_on.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;
                }
        }