function sys_login_request(formid)
{
 var  form=$('#'+formid);
 var un=$('input[name="username"]',form).val();
 var pw=$('input[name="password"]',form).val();
 var requestparams=myserialize({username:un,password:pw,'submit':true});
 var params={sitemode:'site',command:'sys_login_request',requestparams:requestparams};
 execute_java(params);
}