function RPC(id, sesid) {
    
        this.frame = document.createElement('iframe');
        this.frame.id = id;
        this.frame.name = id;
        this.frame.src = 'rpc_handler.php';
        this.frame.style.border = '0px';
        this.frame.style.width = '0px';
        this.frame.style.height = '0px';

        this.sesid = sesid;
        
        this.doTask = function(task, details) {
            this.frame.src = "rpc_handler.php?sesid=" + this.sesid + "&task=" + task + "&" + details;
        };
        
        document.body.insertBefore(this.frame, document.body.firstChild);
        return this;
        
    }