ldata = new Array("./images/menu01.gif","./images/menu02.gif","./images/menu03.gif","./images/menu04.gif","./images/menu05.gif");
ldata2 = new Array("./images/menu01_o.gif","./images/menu02_o.gif","./images/menu03_o.gif","./images/menu04_o.gif","./images/menu05_o.gif");

lover = new Array();
for(i=0 ; i<ldata2.length ; i++){
lover[i] = new Image();
lover[i].src = ldata2[i];
}

function loverImg(num){
document.images["lmenu"+num].src = lover[num].src;
}

function loutImg(num){
document.images["lmenu"+num].src = ldata[num];
}