if (document.images) {
        menu1on = new Image();
        menu1on.src = "images/nav-home-on.gif"; 
        menu1off = new Image();
        menu1off.src = "images/nav-home-off.gif";
}
function changeImages(){
        if(document.images){
                for (var i=0; i<changeImages.arguments.length; i+=2) {
                        document[changeImages.arguments[i]].src = eval(changeImages.arguments[i+1] + ".src");
                }
        }
}



function clearText(el) {
if (el.defaultValue==el.value) el.value = ""
}



function NewWindow(mypage, myname, w, h, scroll) {
var winl = (screen.width - w) / 2;
var wint = (screen.height - h) / 2;
winprops = 'height='+h+',width='+w+',top='+wint+',left='+winl+',scrollbars='+scroll+',resizable'
win = window.open(mypage, myname, winprops)
if (parseInt(navigator.appVersion) >= 4) { win.window.focus(); }
}