ie 31 limit support

css.js

@@ -1,6 +1,6 @@
 /*
  * Require-CSS RequireJS css! loader plugin
- * 0.0.8
+ * 0.1.1
  * Guy Bedford 2013
  * MIT
  */
@@ -60,20 +60,49 @@ define(function() {
   cssAPI.pluginBuilder = './css-builder';
 
   // <style> @import load method
-  var curStyle;
+  var curStyle, curSheet;
   var createStyle = function () {
     curStyle = document.createElement('style');
     head.appendChild(curStyle);
+    curSheet = curStyle.styleSheet || curStyle.sheet;
+  }
+  var ieCnt = 0;
+  var ieLoads = [];
+  var ieCurCallback;
+
+  var createIeLoad = function(url) {
+    ieCnt++;
+    if (ieCnt == 32) {
+      createStyle();
+      ieCnt = 0;
+    }
+    curSheet.addImport(url);
+    curStyle.onload = processIeLoad;
+  }
+  var processIeLoad = function() {
+    ieCurCallback();
+
+    var nextLoad = ieLoads.shift();
+
+    if (!nextLoad)
+      return;
+
+    ieCurCallback = nextLoad[1];
+    createIeLoad(nextLoad[0]);
   }
   var importLoad = function(url, callback) {
-    createStyle();
-
-    var curSheet = curStyle.styleSheet || curStyle.sheet;
+    if (!curSheet || !curSheet.addImport)
+      createStyle();
 
     if (curSheet && curSheet.addImport) {
       // old IE
-      curSheet.addImport(url);
-      curStyle.onload = callback;
+      if (ieCurCallback) {
+        ieLoads.push([url, callback]);
+      }
+      else {
+        createIeLoad(url);
+        ieCurCallback = callback;
+      }
     }
     else {
       // old Firefox
@@ -128,4 +157,4 @@ define(function() {
   }
 
   return cssAPI;
-});
+});