利用SOAP(简单对象访问协议)调用Web Service
脚本库下载以及说明书：
http://www.guru4.net/articoli/javascript-soap-client/en/12个实例：
http://www.guru4.net/articoli/javascript-soap-client/demo/en.aspxThe Client invokes the SOAPClient.invoke method using a JavaScript function and specifying the following:
* Web Service URL (pls note that many browsers do not allow cross-domain calls for security reasons)
* Web method name
* Web method parameter values
* Call mode (async = true, sync = false)
* CallBack method invoked upon response reception (optional for sync calls)