bu01_on = new Image();
bu01_on.src = "image/menu/bu01_on.gif";
bu01_off= new Image();
bu01_off.src= "image/menu/bu01_off.gif";

bu02_on = new Image();
bu02_on.src = "image/menu/bu02_on.gif";
bu02_off= new Image();
bu02_off.src= "image/menu/bu02_off.gif";

bu03_on = new Image();
bu03_on.src = "image/menu/bu03_on.gif";
bu03_off= new Image();
bu03_off.src= "image/menu/bu03_off.gif";

bu04_on = new Image();
bu04_on.src = "image/menu/bu04_on.gif";
bu04_off= new Image();
bu04_off.src= "image/menu/bu04_off.gif";

bu05_on = new Image();
bu05_on.src = "image/menu/bu05_on.gif";
bu05_off= new Image();
bu05_off.src= "image/menu/bu05_off.gif";

bu06_on = new Image();
bu06_on.src = "image/menu/bu06_on.gif";
bu06_off= new Image();
bu06_off.src= "image/menu/bu06_off.gif";


function imgRoll(imgDocID, mouseMov) {
	if ( mouseMov == "in" ) {
		document.images[imgDocID].src = eval(imgDocID + "_on.src");
	}
	if ( mouseMov == "out" ) {
		document.images[imgDocID].src = eval(imgDocID + "_off.src");
	}
}