java script passing an object :s *RESOLVED*

hey im trying to pass the value of a text box to a popup window.
heres my code

reg.js

Code:

---

function OpenWin(textbox)
{
strName = textbox.value;
window.open('DYNAMIC/validate.asp?Username='+strName+'',null, 'height=200,width=800,status=no,toolbar=no,menubar=no,location=no');
}

---

reg.html

Code:

---

<script language="javascript" src="include/reg.js"></script>
<form name="Register" method="post">
<a href="javascript:OpenWin(Register.username);">Check</a>
<input type="text" id="username" value="username">
</form>

---

Cheers :p

reg.js

Code:

---

function OpenWin(strName){
window.open('DYNAMIC/validate.asp?Username='+strName+'',null, 'height=200,width=300,status=no,toolbar=no,menubar=no,location=no');
}

---

reg.html

Code:

---

<a href="javascript:OpenWin<script language="javascript" src="include/reg.js"></script>
<form name="Register" method="post">
<a href="java script:OpenWin(window.username.username);">Check</a>
<input type="text" id="username" value="username">
</form>

---