from the below code how do I pass the contents of the 'username' field to the end of the URL:

https://carrierconnect.etdatacenter....&user=username

where I currently have username


Basically the form works where I fill in the username and password then based on whether the user selects 'customer tracking' or 'web booking' goes to the specific URL



<script type="text/javascript">

function OnSubmitForm()

{

if(document.myform.operation[0].checked == true)

{

document.myform.action ="https://webtrace.etdatacenter.com/webtrace.aspx?accesstype=autologin&cust=id_015&user=templateuser";

}

else

if(document.myform.operation[1].checked == true)

{

document.myform.action ="https://carrierconnect.etdatacenter.com/Default.aspx?accesstype=autologin&cust=id_015&user=username";

}

return true;

}

</script>



<form name="myform" target="_blank" method="post" action="" onsubmit="return OnSubmitForm();">
<fieldset>
<legend><font color="#FFFFFF">LOGIN</font></legend>
username: <input type="text" name="username"/><br /><br />
password: <input type="password" name="password"/><br />
<input type="radio" name="operation" value="1" checked="checked"/><font size="-1">Customer Tracking</font>
<input type="radio" name="operation" value="2" /><font size="-1">Web Booking </font>
<input type="submit" name="submit" value="submit" />
</fieldset>

</form>