bVer=parseInt(navigator.appVersion);
        if (document.images) {
					Off = new Array();
        	Off[0] = new Image();
            Off[0].src = "images/join.gif";            

        	On = new Array();
            On[1] = new Image();
            On[1].src = "images/joinon.gif";
            On[2] = new Image();
            On[2].src = "images/tryon.gif";       
        }     

function rollOver(imgNum) {
        document.join.src = On[imgNum].src;
        }

function rollOut(imgNum) {
        document.join.src = Off[imgNum].src;
        }