var imgLoaded=0
var param='image/'
var v=parseInt(navigator.appVersion)

if (document.images) {
I1On=new Image();
I1Off=new Image();
I1On.src=param+"window.gif"
I1Off.src=param+"window0.gif"
imgLoaded=1;
I2On=new Image();
I2Off=new Image();
I2On.src=param+"mail.gif"
I2Off.src=param+"mail0.gif"
imgLoaded=1;
I3On=new Image();
I3Off=new Image();
I3On.src=param+"map.gif"
I3Off.src=param+"map0.gif"
}


function Over(Img) {
if (3<=v) {if(imgLoaded==0) return;
document[Img].src=eval(Img+"On.src");
}
}
function Out(Img) {
if (3<=v) {
if(imgLoaded==0) return;
document[Img].src=eval(Img+"Off.src");
}
}