diff --git a/lib/client/ie.js b/lib/client/ie.js
index 89ebd8d7..cb2579fb 100644
--- a/lib/client/ie.js
+++ b/lib/client/ie.js
@@ -112,11 +112,12 @@ var CloudCommander, $;
     if(!document.body.classList){
         lUtil.addClass = function(pElement, pClass){
             var lSpaceChar  = '',
+                lClassName  = pElement.className,
                 lRet_b      = true;
             
-            if(pElement.className)
-                lSpaceChar = ' ';
-            if( !pElement.contains(pClass) )
+            if(lClassName) lSpaceChar = ' ';
+            
+            if( lClassName.indexOf(pClass) < 0 )
                 pElement.className += lSpaceChar + pClass;
             else
                 lRet_b = false;