var net = new Object();

net.READY_STATE_UNINITIALIZED= 0;
net.READY_STATE_LOADING      = 1;
net.READY_STATE_LOADED       = 2;
net.READY_STATE_INTERACTIVE  = 3;
net.READY_STATE_COMPLETE     = 4;

net.ContentLoader = function( url, funcSuccess, funcFail, method, requestParams, contentType ) {
   this.url = url;
   this.functionSucceeded = funcSuccess;
   this.functionFailed = funcFail;
   this.method = method;
   this.requestParams = requestParams;
   this.contentType = contentType;
}

net.ContentLoader.prototype = {

   getTransport: function() {
      var transport;
      if ( window.XMLHttpRequest )
         transport = new XMLHttpRequest();
      else if ( window.ActiveXObject ) {
         try {
            transport = new ActiveXObject('Msxml2.XMLHTTP');
         }
         catch(err) {
            transport = new ActiveXObject('Microsoft.XMLHTTP');
         }
      }
      return transport;
   },

   sendRequest: function() {

/*      if ( window.netscape && window.netscape.security.PrivilegeManager.enablePrivilege)
         netscape.security.PrivilegeManager.enablePrivilege('UniversalBrowserRead'); */

      var requestParams = []
      for ( var i = 0 ; i < arguments.length ;  i++ ) {
         requestParams.push(arguments[i]);
      }

      var oThis = this;
      var request = this.getTransport();
      request.open( this.method, this.url, true );
      request.setRequestHeader( 'Content-Type',
            this.contentType ? this.contentType : 'application/x-www-form-urlencoded' );
      request.onreadystatechange = function() { oThis.handleAjaxResponse(request) };
      request.send( this.queryString(requestParams) );
  },

  queryString: function(args) {

     var requestParams = [];
     if ( this.requestParams ) {
        for ( var i = 0 ; i < this.requestParams.length ; i++ ) {
           requestParams.push(this.requestParams[i]);
        }
     }
     for ( var j = 0 ; j < args.length ; j++ )
        requestParams.push(args[j]);

     var queryString = "";
     if ( requestParams && requestParams.length > 0 ) {
        for ( var i = 0 ; i < requestParams.length ; i++ )
           queryString += requestParams[i] + '&';
        queryString = queryString.substring(0, queryString.length-1);
     }
     return queryString;
  },

  handleAjaxResponse: function(request) {
     if ( request.readyState == net.READY_STATE_COMPLETE ) {
        if ( this.isSuccess(request) ) {
           if ( this.functionSucceeded ) {
              this.functionSucceeded(request);
           }
        } else {
           if ( this.functionFailed ) {
              this.functionFailed(request);
           }
        }
     }
  },

  isSuccess: function(request) {
    return  request.status == 0 
        || (request.status >= 200 && request.status < 300);
  }

};