var cashimg= new Array (

"images/topm01_on.gif",
"images/topm02_on.gif",
"images/topm03_on.gif",
"images/topm04_on.gif",
"images/topm05_on.gif"

)
for(i=0;i<cashimg.length;i++){
 a = new Image;
 a.SRC=cashimg[i];
}

var cuitem= new Image;
function imgOn(item) {
        if(item.name != cuitem.name)
  item.src = "images/" + item.name+"_on.gif"
}
                 
function imgOff(item) {
        if(item.name != cuitem.name)
         item.src = "images/" + item.name+"_off.gif"
}

function Click(item){
        if(item.name!=cuitem.name){
                item.src= "images/" + item.name+"_on.gif"
  cuitem.src="images/" + cuitem.name+"_off.gif"
 }
 cuitem=item
        return true
}