与soap Web服务的JQuery Ajax通信需要身份验证

Question

要访问Web服务，请求需要身份验证而不需要用户名和密码，如何将它们添加到我的代码中：

function sendReq()
{    var wsUrl = "*******";
    var soapRequest ='<?xml version="1.0" encoding="utf-8"?>'+
        '<soap:Envelope xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:soap="http://schemas.xmlsoap.org/soap/envelope/">'+
  '<soap:Body>'+
    '<UpdateImage xmlns="*******">'+
      '<urlSite>*********</urlSite>'+
      '<iListName>{*****}</iListName>'+
      '<iUpdateMode>****</iUpdateMode>'+
      '<iMetaData><Fields><Field Name="Title" >'+my_var1+'</Field></Fields></iMetaData>'+
      '<iAttachments><Attachments><Attachment Name="Nom du fichier 1">'+my_var2+'</Attachment></Attachments></iAttachments>'+
      '<iOverWrite>*****</iOverWrite>'+
    '</UpdateImage>'+
  '</soap:Body>'+
'</soap:Envelope>';
   $.ajax({
                    type: "POST",
                    url: wsUrl,
                    contentType: "text/xml; charset=utf-8",
                    dataType: "xml",
                    data: soapRequest,
                    beforeSend: function (xhr){ 
        xhr.setRequestHeader("SOAPAction", "****/UpdateImage");
    },                
    contentType: "text/xml; charset=utf-8",
            success: processSuccess,
            error: processError
        });

返回false;