js怎么调用webserver啊？

android通过soap协议调用webserver。方法如下：
public String realBus(int gprsId,int orderNo, int direction, String url) throws WSError {

    SoapObject rpc = new SoapObject(REAL_NAMESPACE, "realBus");  
         // 指定 WebService 的命名空间和调用方法  
    rpc.addProperty("gprsId", gprsId);   
    rpc.addProperty("orderNo", orderNo);    
    rpc.addProperty("direction", direction);  
    String response = doWebServicesRequest(rpc, url);// 获取响应值  
    return response;  
}  

    public  String doWebServicesRequest(SoapObject rpc,String url) throws WSError{  
    // 生成调用WebService方法的SOAP请求信息  
     SoapSerializationEnvelope envelope = new     
            SoapSerializationEnvelope(SoapEnvelope.VER11);  
    envelope.encodingStyle = SoapSerializationEnvelope.ENC;  
    envelope.encodingStyle = "UTF-8";  

    envelope.bodyOut = rpc;  
    envelope.dotNet = true;  
    envelope.setOutputSoapObject(rpc);  
    // 创建HttpTransportsSE对象  
    HttpTransportSE ht = new HttpTransportSE(url);  
    ht.debug = true ;  
    try {  
        ht.call(null, envelope);  
        if (envelope.getResponse() != null) {  
            String reString = envelope.getResponse().toString();  
            if(reString.equals("anyType{}") || reString.equals("null")){  
                reString = "";  
            }  
            return reString;  
        }  
    } catch (Exception e) {  
        WSError wsError = new WSError();  
        wsError.setMessage(e.getLocalizedMessage());  
        throw wsError;  
    }   
    return "";  
}  

   js怎么调用同一个接口啊？  
   命名空间   方法名  url  怎么传参啊？  
   求具体代码。拜托拜托。。。。。。