including javascript

I’m trying to get a 3rd party login script to work here.

The code is supplied by the vendor. It’s a membership site that my client had before they hired me to put their site on WP.

The login doesn’t work anymore. Is it a WP conflict or something wrong with the code?

Code in head:

<script language="JavaScript">

  function forgotPassword() {
    newWindow = window.open("https://web.theirsite.com/mc/common/forgotpassword.do?hidOrgID=ap",
    "ForgotPassword",
    "height=150,width=300,menubar=0,location=0,personalbar=0,toolbar=0,titlebar=0,status=0");
    }

  function formSubmit() {
    document.frmLogin.txtUserId.value = document.frmUserName.txtUserId.value;
    document.frmLogin.submit();
    }

  function submit1() {
    document.frmLogin.txtPassword.focus();
    return false;
    }

  function submit2() {
    document.frmLogin.txtUserId.value = document.frmUserName.txtUserId.value;
    myUrlEncode(document.frmUserName.txtUserId.value,document.frmLogin.txtUserId);
    myUrlEncode(document.frmLogin.txtPassword.value,document.frmLogin.txtPassword);
    return true;
    }

</script>

Code in body:
<form> <strong>Username:</strong><p> </p> <input name="txtUserId" type="text" /> </form> <form action="https://web.theirsite.com/mc/login.do" method="post"> <strong>Password:</strong><p> </p> <input name="txtPassword" type="password" /> <input name="hidOrgID" type="hidden" value="ap" /> <input name="txtUserId" type="hidden" /> <input name="isencodedstring" type="hidden" value="no" /> <input name="mcevent" type="hidden" value="mcsubmit" /> <a href="JavaScript: formSubmit();"> <img src="https://web.theirsite.com/mcdatafiles/images/styles/11/login.gif" border="0" alt="Login" /> </a> <a href="JavaScript: forgotPassword();"> <img src="https://web.theirsite.com/mcdatafiles/images/styles/11/forgotpass.gif" border="0" alt="Forgot Password" /> </a> </form>