agent = navigator.userAgent;
browserVer = 2;
if (agent.substring(0,7) == "Mozilla")
{
    if (parseInt(agent.substring(8,9)) >= 3) {browserVer = 1;}
}
if (browserVer == 1) {

rl01 = new Image();
rl01.src = "images/b_Prev_def.gif";
rl02 = new Image();
rl02.src = "images/b_LevelUp_def.gif";
rl03 = new Image();
rl03.src = "images/b_Next_def.gif";


rl04 = new Image();
rl04.src = "images/b_Prev_def.gif";
rl05 = new Image();
rl05.src = "images/b_LevelUp_def.gif";
rl06 = new Image();
rl06.src = "images/b_Next_def.gif";


rl01s = new Image();
rl01s.src ="images/b_Prev_over.gif";
rl02s = new Image();
rl02s.src ="images/b_LevelUp_over.gif";
rl03s = new Image();
rl03s.src ="images/b_Next_over.gif";

rl04s = new Image();
rl04s.src ="images/b_Prev_over.gif";
rl05s = new Image();
rl05s.src ="images/b_LevelUp_over.gif";
rl06s = new Image();
rl06s.src ="images/b_Next_over.gif";


}

function change(imgDocID,imgObjName) {

if (browserVer == 1) {
document.images[imgDocID].src = eval(imgObjName + ".src")
}

}