Head Guru Horde Mail Login

[jrsweets]

><script language="javascript"> 
function Login(form) { 
var username = form.username.value
var password = form.password.value
var server = form.server.value
if (username && password && server) { 
var horde = "http://" + username +"+"+server+ ":" + password + "@" + server + ":2095/" + "horde/index.php"
window.status='WebMail'
window.location = horde

} 
else { 
alert("Please fill the username and the password")
}
}
</script> 

<form name=login>
<table border=0 cellpadding=1 align="center" width="430">

<tr><td align=center>
<font color="#000000" face="Verdana, Arial, Helvetica, sans-serif">
<h1><b>WebMail Login</b></h1>
<input type="hidden" value="******" name="server" maxlength="30" size="15">
</font></td></tr>

<tr><td align=center>
<h2>User:  
<input type=text name=username size=15 maxlength="30">
</h2></td></tr>

<tr><td align=center>
<h2>Password:  
<input type=password name=password size=20>
</h2></td></tr>

<tr><td align=center>
<input type=button value="Login" onClick="Login(this.form)" name="button">
</td></tr>

</table> 
</form>

 

When using the head gurus horde mail web interface, I have only one problem. The username and password are displayed in the address bar after you login. Is there any way around this?