Submitting my login form on enter

[chemman14]

For some reason when I hit enter on my javascript form nothing happens, I must click the logon button for it to work. Here is the function that builds the logon form

function BuildPanel() {
document.write('<form name="logon"><table align="center" border="0"><tr><td align="right">');
document.write('<small><font face="Verdana">Username:</font></small></td>');
document.write('<td><small><font face="Verdana"><input type="text" name="username" size="20"></font></small></td></tr>');
document.write('<tr><td align="right"><small><font face="Verdana">Password:</font></small></td>');
document.write('<td><small><font face="Verdana"><input type="password" name="password" size="20"></font></small></td></tr>');
if(imgSubmit == ""){
 document.write('<tr><td align="center" colspan="2"><p><input type="button" value="Logon" name="Logon" onclick="login(username.value,password.value)">'); 
} else {
 document.write('<tr><td align="center" colspan="2"><p><input type="image" src="'+imgSubmit+'" name="Logon" onclick="login(username.value,password.value)">');
}
if(imgReset == ""){
 document.write('<input type="reset" value="Reset" name="Reset">');
} else {
 document.write('<input type="image" src="'+imgReset+'" name="Reset" onclick="logon.reset();">');
}
document.write('</p></td></tr></table></form>')
;

Is it possible to make this work when the user hits the enter button?
thank you

[chemman14]

I just realized I put this in the wrong forum, sorry guys ill repost in the correct forum