function postLogin(){
	var frm=document.loginForm;
	if(frm.username.value==""){
		alert("please input username.");
		frm.username.focus();
		return false;
	}
	display("Loading...",'ajax_loading');
	var username=frm.username.value;
	var password=frm.pass.value;
	oXMLHttp = checkXMLHTTP();
	var setRequest = typeof(oXMLHttp.setRequestHeader);
    if ( oXMLHttp && setRequest!="undefined" )
    {
		var myQuery = "&username="+username + "&pass="+password;
 		orderPost( oXMLHttp, "?sMod=login&CaseAction=login", myQuery, HTTPPostLogin, true );
    }				
}
function HTTPPostLogin()
{
   if ( typeof(oXMLHttp)==='undefined' )
	   return;
	  
	// Return status of XMLHttp object
	if ( oXMLHttp.readyState==4 )
	{ 
		// if oXMLHttp.status is OK
		if ( oXMLHttp.status==200 )
		{    
			sRes = oXMLHttp.responseText;
			oJson = sRes.parseJSON(); 
			 if ( typeof( oJson ) === 'object' )
			 {
				if ( oJson['BODY']['RES'] != '' )
				{
				var respontext= oJson['BODY']['RES'];
				
				}	
			}	
			display(sRes,"login_box");
		}
		display("",'ajax_loading');
		if ( oXMLHttp.status==404)
		{
			alert("Page not found");
		}
	}

}
function changeLanguage(lang){
	document.frmLanguage.language.value=lang;
	document.frmLanguage.submit();
}