<input type="password" id="password" name="password" size="25" tabindex="5"  />

<span style="display:none;">&nbsp; Caps lock 已開啟</span>

document.login.username.focus();

var mydate = new Date();
var mytimestamp = parseInt(mydate.valueOf() / 1000);
if(Math.abs(mytimestamp - $timestamp) > 86400) {
        window.alert('{lang login_timeoffset}');
}

function detectCapsLock(event){
    var e = event||window.event;
    var o = e.target||e.srcElement;
    var oTip = o.nextSibling;
    var keyCode = e.keyCode||e.which;
    var isShift = e.shiftKey ||(keyCode ==   16 ) || false ;
     if (
     ((keyCode >=   65   && keyCode <=   90 ) &&   !isShift)
     || ((keyCode >=   97   && keyCode <=   122 ) && isShift)
     ){oTip.style.display = '';}
     else{oTip.style.display = 'none';}
}
document.getElementById('password').onkeypress = detectCapsLock;

可自由更改紅色字體內容(留意編碼)