function hiImg(img) { }
function loImg(img) { }
var _safe = false;
function BrowserCan() {
        if ((navigator.userAgent.indexOf("Mozilla/3.")!= -1)||(navigator.userAgent.indexOf("Mozilla/4.")!= -1)||(navigator.userAgent.indexOf("Mozilla/5.")!= -1) )
                {
                        return true;
                }
}
function max(a,b) {
        return (a >= b) ? a : b;
}
function basename(s) {
        var y = s.lastIndexOf(".");
        if (y < 0) {
                y = s.length;
        }
        return s.substring(max(s.indexOf(":"), s.lastIndexOf("/"))+1, y);
}
function baseurl(s) {
        return s.substring(0, max(s.indexOf(":"), s.lastIndexOf("/"))+1);
}
function extn(s) {
        var x = s.lastIndexOf(".");
        if (x <= 0) {
                x = s.length;
        }
        return s.substring(x, s.length);
}
function makeImg(base, name, ext, w, h) {
	 if (BrowserCan()) {
        eval(name + " = new Image(" + w + ", " + h + ")");
        eval(name + ".src = \"" + base + name + ext + "\"");
	}
}
function makeBtn(it) {
	 if (BrowserCan()) {
        var base = baseurl(it.src);
        var ext = extn(it.src);
        var name = basename(it.src);
        makeImg(base, name, ext, it.width, it.height);
        name = name.substring(0, name.indexOf("_lo")) + "_hi";
        makeImg(base, name, ext, it.width, it.height);
	}
}
function BuildImgs() {
        if (BrowserCan()) {
                for (var i=0; i<document.images.length; i++) {
                        if (document.images[i].src.indexOf("_lo.") >= 0) {
                                makeBtn(document.images[i]); 
                        }
                }
                _safe = true;
        }
}
if (BrowserCan()) {
        eval("function hiImg(img,dd) { if (_safe) {if(dd) {document.images[img].src = dd;}else{ document.images[img].src = eval(img + \"_hi.src\"); }} }");
        eval("function loImg(img,dd) { if (_safe) { if(dd) {document.images[img].src = dd;}else{document.images[img].src = eval(img + \"_lo.src\"); }} }");
                
} else {
        }