How do I log in to a vbulletin forum using curl? This is the login form in the forum I want to log in to: <!-- login form --> <script type="text/javascript" src="clientscript/vbulletin_md5.js?v=386"></script> <form action="http://www.intporn.com/forums/login.php?do=login" method="post" onsubmit="md5hash(vb_login_password, vb_login_md5password, vb_login_md5password_utf, 0)"> <input type="hidden" name="s" value="" /> <input type="hidden" name="do" value="login" /> <input type="hidden" name="vb_login_password" /> <input type="hidden" name="vb_login_md5password" /> <input type="hidden" name="vb_login_md5password_utf" /> <table cellpadding="0" cellspacing="3" border="0"> <tr> <td class="smallfont"><label for="navbar_username">User Name</label></td> <td><input type="text" class="bginput" style="font-size: 11px" name="vb_login_username" id="navbar_username" size="10" accesskey="u" tabindex="101" value="User Name" onfocus="if (this.value == 'User Name') this.value = '';" /></td> <td class="smallfont" colspan="2" nowrap="nowrap"><label for="cb_cookieuser_navbar"><input type="checkbox" name="cookieuser" value="1" tabindex="103" id="cb_cookieuser_navbar" accesskey="c" />Remember Me?</label></td> </tr> <tr> <td class="smallfont"><label for="navbar_password">Password</label></td> <td><input type="password" class="bginput" style="font-size: 11px" name="vb_login_password" id="navbar_password" size="10" tabindex="102" /></td> <td><input type="submit" class="button" value="Log in" tabindex="104" title="Enter your username and password in the boxes provided to login, or click the 'register' button to create a profile for yourself." accesskey="s" /></td> </tr> </table> </form> <!-- / login form --> I have tried to pass do=login vb_login_password" /> vb_login_md5password" /> vb_login_md5password_utf" /> s= vb_login_username= cookieuser=1 but I didn't get it to work. I dont understand the difference between vb_login_md5password and vb_login_md5password_utf.