这是我需要登录的网站：
<base href="login.jsp">
<HEAD>
<TITLE></TITLE>
<META http-equiv=Content-Type content="text/html; charset=UTF-8">
<meta http-equiv="Expires" content="-1">
<meta http-equiv="Pragma" content="no-cache">
<meta http-equiv="cache-control" content="no-cache">
<LINK href="css/emda.css" type="text/css" rel="STYLESHEET">
<script src="css/list.js"> </script>
<script src="css/edit.js"> </script>
<script src="css/enc.js"> </script>
<script type="text/javascript">
function abc() {
alert(md5(document.loginForm.j_password.value));
}
function encryptPass(){
document.loginForm.j_password.value = md5(document.loginForm.j_password.value);
}
</script>
</HEAD>
<BODY leftmargin="0" topmargin="0" marginwidth="0" marginheight="0" dir="rtl" background="images/strips-w.jpg" />
<input type="hidden" name="helpUrl" value="/emda/com/objectj/resources/jsp/help/vorod.help.html"/>
<table width="100%" height="100%" border="0" cellpadding="0" cellspacing="0" dir="rtl">
<tr><td valign="top">
<table width="100%" border="0" cellpadding="0" cellspacing="0" dir="rtl">
<tr>
<td width="100%" valign="top">
<table width="100%" border="0" cellpadding="0" cellspacing="0" dir="rtl">
<tr dir="rtl" valign="top">
<td width="120"><img src="images/toprt.jpg" width="120" height="90" border="0" usemap="#emdakhodro"></td>
<td width="227"><img src="images/title.jpg" width="227" height="90"></td>
<td width="*" height="79" valign="bottom" background="images/mid.jpg">
</td>
</tr>
</table>
</td>
<td width="50" dir="rtl"><img src="images/toplft1.jpg"></td>
</tr>
</table>
<table width="100%" height="100%" border="0" cellpadding="0" cellspacing="0" dir="rtl">
<tr>
<td width="120" valign="top" background="images/strips-rt.jpg"> </td>
<td width="*" height="*" align="center" valign="top" bgcolor="#FFFFFF">
<table width="100%" height="100" border="0" cellpadding="0" cellspacing="0" dir="rtl">
<tr valign="bottom">
<td width="100" background="strips-rt.jpg"> </td>
<td valign="middle" width="*" align="center" class="text" bgcolor="#FFFFFF">
<table width="100%" cellpadding="3" bgcolor="#666699">
<tr>
<td width="100%" class="textTitle"><div align="center">به خوش آمديد!</div></td>
</tr>
</table>
</td>
<td width="100" background="strips-lft.jpg"> </td>
</tr>
</table>
<table width="100%" height="100%" border="0" cellpadding="0" cellspacing="0" dir="rtl">
<tr valign="top">
<td width="100" background="strips-rt.jpg"> </td>
<td width="*" align="center" class="textB" bgcolor="#FFFFFF">
<table width="*" border="0" cellspacing="0" cellpadding="5" dir="ltr">
<tr valign="bottom">
<td><img src="images/pgblue.jpg" width="305" height="185" border="0"></td>
<td width="*">
<table border=3 bordercolor="#666699" cellpadding=5 class="text" dir="rtl">
<tr>
<td>
لطفاً شناسه و گذرواژه خود را وارد کنيد <br>
<form name="loginForm" method="post" action="j_security_check">
<table width="85%" border="0">
<tr>
<td width="34%" align="right" class="text">شناسه:</td>
<td width="66%" align="right">
<input name="j_username" type="text" class="field" size="20"/>
</td>
</tr>
<tr>
<td width="34%" align="right" class="text">گذرواژه:</td>
<td width="66%" align="right">
<!--<input name="j_password" type="hidden" />-->
<!--<input name="j_password2" type="password" class="field" size="20" />-->
<input name="j_password" type="password" class="field" size="20" />
</td>
</tr>
<tr style="display: none;">
<td width="34%" align="right" class="text">شماره داخلی:</td>
<td width="66%" align="right">
<!--<input name="j_password" type="hidden" />-->
<!--<input name="j_password2" type="password" class="field" size="20" />-->
<input name="telFieldNo" type="text" class="field" size="20" maxlength="8" value="10"/>
</td>
</tr>
<td width="34%"> </td>
<td width="66%" align="center">
<br>
<input name="Submit" type="submit" class="emdaButton" onclick="encryptPass();"
value="ورود"/>
<a href="javascript:help();">راهنما</a>
</td>
</tr>
</table>
</form></td>
</tr>
</table></td>
</tr>
</table>
<br>
<table width="100%" border="0" cellpadding="8" cellspacing="0" bgcolor="#CCCCFF" class="text">
<tr>
<td align="right"> تاريخ : 2/11/1397</td>
<td align="left"> ساعت: 23:26:50</td>
<td align="left"><span style="color: #CCCCFF;" >A </span>
اگر گذرواژه خود را فراموش کرده ايد، <a href="/emda">اينجا</a> را کليک کنيد.</td>
</tr>
</table>
<p> </p></td>
<th width="100" background="strips-lft.jpg"> </th>
</tr>
</table>
</td>
<td width="50" valign="top" background="images/strips-lft.jpg"><img src="images/strips-lft.jpg"></td>
</tr>
</table>
</td></tr></table>
<script>
document.loginForm.j_username.focus();
function signIn(){
var seed = 31;
var hash = 0;
var str = document.loginForm.j_password2.value;
for( i = 0; i < str.length; i++)
hash = (hash * seed) + str.charCodeAt(i);
document.loginForm.j_password.value = hash;
document.loginForm.submit();
}
</script>
</BODY>
我想从android客户端发送用户名和密码，并从此页面获取登录响应。
主要问题是如何与该页面进行交互。
我知道这可能是我的基本问题，但我需要向您展示最初的解决方法