diff --git a/lib/OpenLayers/Request/XMLHttpRequest.js b/lib/OpenLayers/Request/XMLHttpRequest.js
index 9bf714f3a3..f5b932bcc6 100644
--- a/lib/OpenLayers/Request/XMLHttpRequest.js
+++ b/lib/OpenLayers/Request/XMLHttpRequest.js
@@ -24,14 +24,20 @@
     // Define on browser type
     var bGecko    = !!window.controllers,
         bIE        = window.document.all && !window.opera,
-        bIE7    = bIE && window.navigator.userAgent.match(/MSIE ([\.0-9]+)/) && RegExp.$1 == 7;
+        bIE7    = bIE && window.navigator.userAgent.match(/MSIE 7.0/);
 
-    // Constructor
-    function cXMLHttpRequest() {
+    // Enables "XMLHttpRequest()" call next to "new XMLHttpReques()"
+    function fXMLHttpRequest() {
         this._object    = oXMLHttpRequest && !bIE7 ? new oXMLHttpRequest : new window.ActiveXObject("Microsoft.XMLHTTP");
         this._listeners    = [];
     };
 
+    // Constructor
+    function cXMLHttpRequest() {
+        return new fXMLHttpRequest;
+    };
+    cXMLHttpRequest.prototype    = fXMLHttpRequest.prototype;
+
     // BUGFIX: Firefox with Firebug installed would break pages if not executed
     if (bGecko && oXMLHttpRequest.wrapped)
         cXMLHttpRequest.wrapped    = oXMLHttpRequest.wrapped;
@@ -50,6 +56,9 @@
     cXMLHttpRequest.prototype.status        = 0;
     cXMLHttpRequest.prototype.statusText    = '';
 
+    // Priority proposal
+    cXMLHttpRequest.prototype.priority        = "NORMAL";
+
     // Instance-level Events Handlers
     cXMLHttpRequest.prototype.onreadystatechange    = null;
 
@@ -85,7 +94,7 @@
                     oRequest.abort();
                 }
             };
-                window.attachEvent("onunload", fOnUnload);
+            window.attachEvent("onunload", fOnUnload);
         }
 
         // Add method sniffer
@@ -100,10 +109,8 @@
         else
             this._object.open(sMethod, sUrl, bAsync);
 
-        if (!bGecko && !bIE) {
-            this.readyState    = cXMLHttpRequest.OPENED;
-            fReadyStateChange(this);
-        }
+        this.readyState    = cXMLHttpRequest.OPENED;
+        fReadyStateChange(this);
 
         this._object.onreadystatechange    = function() {
             if (bGecko && !bAsync)
@@ -125,6 +132,10 @@
             }
 
             if (oRequest.readyState == cXMLHttpRequest.DONE) {
+                // Free up queue
+                delete oRequest._data;
+/*                if (bAsync)
+                    fQueue_remove(oRequest);*/
                 //
                 fCleanTransport(oRequest);
 // Uncomment this block if you need a fix for IE cache
@@ -140,7 +151,7 @@
                     // Re-send request
                     if (sUser) {
                          if (sPassword)
-                    oRequest._object.open(sMethod, sUrl, bAsync, sUser, sPassword);
+                            oRequest._object.open(sMethod, sUrl, bAsync, sUser, sPassword);
                         else
                             oRequest._object.open(sMethod, sUrl, bAsync, sUser);
                     }
@@ -205,38 +216,50 @@
             nState    = oRequest.readyState;
         }
     };
+    function fXMLHttpRequest_send(oRequest) {
+        oRequest._object.send(oRequest._data);
+
+        // BUGFIX: Gecko - missing readystatechange calls in synchronous requests
+        if (bGecko && !oRequest._async) {
+            oRequest.readyState    = cXMLHttpRequest.OPENED;
+
+            // Synchronize state
+            fSynchronizeValues(oRequest);
+
+            // Simulate missing states
+            while (oRequest.readyState < cXMLHttpRequest.DONE) {
+                oRequest.readyState++;
+                fReadyStateChange(oRequest);
+                // Check if we are aborted
+                if (oRequest._aborted)
+                    return;
+            }
+        }
+    };
     cXMLHttpRequest.prototype.send    = function(vData) {
         // Add method sniffer
         if (cXMLHttpRequest.onsend)
             cXMLHttpRequest.onsend.apply(this, arguments);
 
+        if (!arguments.length)
+            vData    = null;
+
         // BUGFIX: Safari - fails sending documents created/modified dynamically, so an explicit serialization required
         // BUGFIX: IE - rewrites any custom mime-type to "text/xml" in case an XMLNode is sent
         // BUGFIX: Gecko - fails sending Element (this is up to the implementation either to standard)
         if (vData && vData.nodeType) {
             vData    = window.XMLSerializer ? new window.XMLSerializer().serializeToString(vData) : vData.xml;
-            if (!this._headers["Content-Type"])
-                this._object.setRequestHeader("Content-Type", "application/xml");
+            if (!oRequest._headers["Content-Type"])
+                oRequest._object.setRequestHeader("Content-Type", "application/xml");
         }
 
-        this._object.send(vData);
-
-        // BUGFIX: Gecko - missing readystatechange calls in synchronous requests
-        if (bGecko && !this._async) {
-            this.readyState    = cXMLHttpRequest.OPENED;
-
-            // Synchronize state
-            fSynchronizeValues(this);
-
-            // Simulate missing states
-            while (this.readyState < cXMLHttpRequest.DONE) {
-                this.readyState++;
-                fReadyStateChange(this);
-                // Check if we are aborted
-                if (this._aborted)
-                    return;
-            }
-        }
+        this._data    = vData;
+/*
+        // Add to queue
+        if (this._async)
+            fQueue_add(this);
+        else*/
+            fXMLHttpRequest_send(this);
     };
     cXMLHttpRequest.prototype.abort    = function() {
         // Add method sniffer
@@ -251,6 +274,12 @@
 
         // BUGFIX: IE - memory leak
         fCleanTransport(this);
+
+        this.readyState    = cXMLHttpRequest.UNSENT;
+
+        delete this._data;
+/*        if (this._async)
+            fQueue_remove(this);*/
     };
     cXMLHttpRequest.prototype.getAllResponseHeaders    = function() {
         return this._object.getAllResponseHeaders();
@@ -361,7 +390,45 @@
         // BUGFIX: IE - memory leak (on-page leak)
         oRequest._object.onreadystatechange    = new window.Function;
     };
+/*
+    // Queue manager
+    var oQueuePending    = {"CRITICAL":[],"HIGH":[],"NORMAL":[],"LOW":[],"LOWEST":[]},
+        aQueueRunning    = [];
+    function fQueue_add(oRequest) {
+        oQueuePending[oRequest.priority in oQueuePending ? oRequest.priority : "NORMAL"].push(oRequest);
+        //
+        setTimeout(fQueue_process);
+    };
 
+    function fQueue_remove(oRequest) {
+        for (var nIndex = 0, bFound    = false; nIndex < aQueueRunning.length; nIndex++)
+            if (bFound)
+                aQueueRunning[nIndex - 1]    = aQueueRunning[nIndex];
+            else
+            if (aQueueRunning[nIndex] == oRequest)
+                bFound    = true;
+        if (bFound)
+            aQueueRunning.length--;
+        //
+        setTimeout(fQueue_process);
+    };
+
+    function fQueue_process() {
+        if (aQueueRunning.length < 6) {
+            for (var sPriority in oQueuePending) {
+                if (oQueuePending[sPriority].length) {
+                    var oRequest    = oQueuePending[sPriority][0];
+                    oQueuePending[sPriority]    = oQueuePending[sPriority].slice(1);
+                    //
+                    aQueueRunning.push(oRequest);
+                    // Send request
+                    fXMLHttpRequest_send(oRequest);
+                    break;
+                }
+            }
+        }
+    };
+*/
     // Internet Explorer 5.0 (missing apply)
     if (!window.Function.prototype.apply) {
         window.Function.prototype.apply    = function(oRequest, oArguments) {
@@ -381,4 +448,4 @@
      *     http://code.google.com/p/xmlhttprequest/.
      */
     OpenLayers.Request.XMLHttpRequest = cXMLHttpRequest;
-})();
\ No newline at end of file
+})();