Javascript: doPostBack()

[nolochemical]

Hey I'm trying to parse a web page [ http://www.duvalclerk.com/ONCOREWEB/search.aspx?bd=2%2F21%2F2008&ed=2%2F22%2F2008&n=***&bt=OR&d=2%2F22%2F2008&pt=-1&dt=MTG%2CSAT%2CASSIGN&st=fullname ]

 

Above and below the search data the pages are numbered (1-10) links. To move from page to page.

 

The links uses "javascript:__doPostBack('dgResults$_ctl1$_ctl2','')"  to move from page to page. I was wondering

 

how the function works so I can move from page to page within my script... what I have so far is but I seem to be getting errors:

 

<?php
$url = "http://www.duvalclerk.com/ONCOREWEB/search.aspx?'&bd=2/8/2008&ed=2/9/2008&n=***&bt=OR&d=2/9/2008&dt=MTG,SAT,ASSIGN&st=fullname";
$max = file_get_contents($url);
echo $max;
echo "<form action=".$url." method='post'>
<input type='hidden' name='try' value='javascript:__doPostBack('dgResults$_ctl1$_ctl2','')' />
<input type='submit'  name='zim' value='&&&&&&&&&&&&&&&&&&&&&&&' />
</form>";
?>

 

I searched the site, but the two previous posts don't give much insight. Any help would be greatly appreciated.

 

~Nolo