function getHttp(url){
        var o;
        if(window.ActiveXObject){
            try{
                o=new ActiveXObject('MSXML2.XMLHttp');
            }catch(e){
            try{
                o=new ActiveXObject('Microsoft.XMLHttp');
            }catch(e){}
        }
        }else{
            if(window.XMLHttpRequest) o=new XMLHttpRequest();
        }
        
        if(o){
            o.open('GET',url,false); //&uidx='+Math.random()
            o.send(null);
            if(o.status==200)
                return o.responseText;
            else
                return '';
        }
    }