problemer med et pop i javascript

<form><input type="button" name="password" onclick="pass();" value="?"/>
</form>
<script type="text/javascript">
function pass()
    {
        alert("Sikker dig at ingen ser dit password!.");
    }
</script>

<form onsubmit="pass();"><input type="submit" name="password" value="?"/>
</form>
<script type="text/javascript">
function pass()
    {
        alert("Sikker dig at ingen ser dit password!.");
    }
</script>

<input type="submit" value="Godkend profil" onclick="godkendt_bruger();">

function godkendt_bruger()
    {
        alert("Din Bruger nu blevet opret, Du skal tjek din email fra os.");
    }
   
    function pass()
    {
        alert("Sikker dig at ingen ser dit password!.");
    }

<form name="FORM" action="opret.php" method="post" onsubmit="return check()">
    Brugernavn: <input name="NAVN" type="text">
    <br>
    Password: <input name="PASS" type="password">
    <br>
    <input type="submit" value="Opret">
</form>

...

<script>
String.prototype.trim = function() { return this.replace(/^\s+|\s+$/g,"") } // fjern luft foran/bagi streng
function check()
    {
    document.FORM.NAVN.value = document.FORM.NAVN.value.trim()
    document.FORM.PASS.value = document.FORM.PASS.value.trim()
    var fejl = ""
    if (document.FORM.NAVN.value.length() == 0)
        fejl += "\n - Brugernavn mangler."

    if (document.FORM.PASS.value.length() < 6)
        fejl += "\n - Password er for kort (minimum 6 tegn)."

    if (fejl != "")
        {
        alert("Fejl:" + fejl)
        return false // submit stoppes
        }

    return true // submit udføres
    }
</script>

<tr>
            <td><p>Der kommer intet spam til mobil eller email!</p></td>
            <td>:</td>
            <td><input type="submit" value="Godkend profil" onclick="godkendt_bruger();"></td>
        </tr>

function godkendt_bruger()
    {
        alert("Din Bruger nu blevet opret, Du skal tjek din email fra os");
    }

<tr>
            <td><p>Adgangskode</p></td>
            <td>:</td>
            <td><input type="password" name="password"></td>
            <td><input type="button" name="password" onclick="password();" value="?"/></td>
        </tr>

    function password()
    {
        alert("Sikker dig at ingen ser dit password!.");
    }

<style type="text/css">
<!--
.box {
background-color: #F4F4F4;
border: 1px solid #CCC;
height: 100px;
width: 200px;
padding: 5px;
display:none;
position:absolute;
}

-->
</style>
<script type="text/javascript" language="JavaScript">
var cX = 0; var cY = 0; var rX = 0; var rY = 0;
function UpdateCursorPosition(e){ cX = e.pageX; cY = e.pageY;}
function UpdateCursorPositionDocAll(e){ cX = event.clientX; cY = event.clientY;}
if(document.all) { document.onmousemove = UpdateCursorPositionDocAll; }
else { document.onmousemove = UpdateCursorPosition; }
function AssignPosition(d) {
if(self.pageYOffset) {
rX = self.pageXOffset;
rY = self.pageYOffset;
}
else if(document.documentElement && document.documentElement.scrollTop) {
rX = document.documentElement.scrollLeft;
rY = document.documentElement.scrollTop;
}
else if(document.body) {
rX = document.body.scrollLeft;
rY = document.body.scrollTop;
}
if(document.all) {
cX += rX;
cY += rY;
}
d.style.left = (cX+10) + "px";
d.style.top = (cY+10) + "px";
}
function HideText(d) {
if(d.length < 1) { return; }
document.getElementById(d).style.display = "none";
}
function ShowText(d) {
if(d.length < 1) { return; }
var dd = document.getElementById(d);
AssignPosition(dd);
dd.style.display = "block";
}
function ReverseContentDisplay(d) {
if(d.length < 1) { return; }
var dd = document.getElementById(d);
AssignPosition(dd);
if(dd.style.display == "none") { dd.style.display = "block"; }
else { dd.style.display = "none"; }
}
//-->
</script>


<span
onmouseover="ShowText('Message'); return true;"
onmouseout="HideText('Message'); return true;"
href="java script:ShowText('Message')">
<img src="http://www.wallpaperama.com/forums/post-images/20081107_6718_question-mark.gif">
</span>
<div
id="Message"
class="box"
>
You can find good wallpapers at wallpaperama.com plus stuff to get your wallpaper website going
</div>