Logging in to a website using.

Hello,

I have a problem that I cant seem to find a solution for.
I need to login to a partner site to get update job data.
That has to be done every 3 hours.
I would like to make a script that will check this and notify
me with an e-mail when anything changes, which would make my days
easier.

The problem is that I cant make a script to automatically login to the site.
The form for authentication follows:

<form name="WebForm1" method="post" action="Default.aspx" language="javascript" onsubmit="if (!ValidatorOnSubmit()) return false;" id="WebForm1">
<input type="hidden" name="__VIEWSTATE" value="dDwtOTY0ODk4MDY0O3Q8O2w8aTwxPjs+O2w8dDw7bDxpPDE+Oz 47bDx0PDtsPGk8Mz47PjtsPHQ8cDxwPGw8VGV4dDs+O2w8XGU7 Pj47Pjs7Pjs+Pjs+Pjs+Pjs+sb5myG1JP2fuwGEjJ59nQ373rj 8=" />

<input name="txt_user" type="text" maxlength="10" id="txt_user" tabindex="1" style="border-width:1px;border-style:solid;width:126px;" />
<span id="RequiredFieldValidator1" controltovalidate="txt_user" errormessage="Användarnamn" display="Dynamic" evaluationfunction="RequiredFieldValidatorEvaluateIsValid" initialvalue="" style="color:Red;display:none;">*</span><BR>

- - - -- - Some html code...

<input name="txt_pass" type="password" maxlength="10" id="txt_pass" tabindex="2" style="border-width:1px;border-style:solid;width:125px;" />
<span id="RequiredFieldValidator2" controltovalidate="txt_pass" errormessage="Lösenord" display="Dynamic" evaluationfunction="RequiredFieldValidatorEvaluateIsValid" initialvalue="" style="color:Red;display:none;">*</span><BR>

- - - -- - Some html code...

<input type="submit" name="cmd_login" value="Logga in" onclick="if (typeof(Page_ClientValidate) == 'function') Page_ClientValidate(); " language="javascript" id="cmd_login" tabindex="3" style="border-width:1px;border-style:solid;font-weight:bold;width:64px;" />&nbsp;
<input type="submit" name="cmd_clear" value="Rensa" id="cmd_clear" tabindex="4" style="border-width:1px;border-style:solid;font-weight:bold;width:50px;" /><BR>

<div id="ValidationSummary1" headertext="Följande uppgifter saknas" showmessagebox="True" showsummary="False" style="color:Red;display:none;">

<script language="javascript" type="text/javascript">
<!--
var Page_ValidationSummaries = new Array(document.all["ValidationSummary1"]);
var Page_Validators = new Array(document.all["RequiredFieldValidator1"], document.all["RequiredFieldValidator2"]);
// -->
</script>
<SCRIPT language='javascript'>document.getElementById('txt_user').focus() </SCRIPT>

<script language="javascript" type="text/javascript">
<!--
var Page_ValidationActive = false;
if (typeof(clientInformation) != "undefined" && clientInformation.appName.indexOf("Explorer") != -1) {
if ((typeof(Page_ValidationVer) != "undefined") && (Page_ValidationVer == "125"))
ValidatorOnLoad();
}
function ValidatorOnSubmit() {
if (Page_ValidationActive) {
return ValidatorCommonOnSubmit();
}
return true;
}
// -->
</script>

</form>

Is there anyone that can help me to find a way to make a automatic login based on the information ?

/P-H