ie7 fixes: define indexOf, use charAt rather than [] to access string,

put try/catch around fn that was throwing errors.

lms/static/coffee/src/main.coffee

@@ -37,3 +37,11 @@ $ ->
   $('#signup').click ->
     $('#signup-modal input[name="email"]').focus()
     false
+
+  # fix for ie
+  if !Array::indexOf
+  	Array::indexOf = (obj, start = 0) ->
+  		for ele, i in this[start..]
+            if ele is obj
+                return i + start
+        return -1

lms/static/sass/bourbon/css3/_box-sizing.scss

@@ -2,6 +2,5 @@
 //  content-box | border-box | inherit
   -webkit-box-sizing: $box;
      -moz-box-sizing: $box;
-          box-sizing: $box;
           box-sizing: $box; *behavior: url(/static/scripts/boxsizing.htc);
 }

lms/static/scripts/boxsizing.htc

@@ -85,7 +85,10 @@ function update(){
   }
   resizetimeout = window.setTimeout(function(){
     restore();
-    init();
+    try {
+        init();
+    }
+    catch (err) {}
     resizetimeout = null;
   },100);
 }