var imageArray_on = new Array();
var imageArray_off = new Array();

function cacheImages (){
	for(var i = 1; i < 4; i++){
		imageArray_on[i] = new Image();
		imageArray_on[i].src = "images/mr" + i + "_on_e.gif";
		imageArray_off[i] = new Image();
		imageArray_off[i].src = "images/mr" + i + "_off_e.gif";
	}
	for(i = 4; i < 12; i++){
		imageArray_on[i] = new Image();
		imageArray_on[i].src = "images/m" + (i - 3) + "_on_e.gif";
		imageArray_off[i] = new Image();
		imageArray_off[i].src = "images/m" + (i - 3) + "_off_e.gif";
	}
	imageArray_on[12] = new Image();
	imageArray_on[12].src = "images/mr3_on_f.gif";
	imageArray_off[12] = new Image();
	imageArray_off[12].src = "images/mr3_off_f.gif"; 
}

function imageSwitch(imageName,onoff){
	img_index = imageName.substring(2);
	//if (document.images && document.images[imageName].complete){
		document.images[imageName].src = eval("imageArray_" + onoff + "[" + img_index + "].src");
	//}
	return false;
}