diff --git a/js/cs.js b/js/cs.js
index db0aa92..9e4244e 100644
--- a/js/cs.js
+++ b/js/cs.js
@@ -246,6 +246,25 @@ $(window).resize(function() {
 $(window).load(function() {
 	stickyFoot();
 });
+function onElementHeightChange(elm, callback){
+    var lastHeight = elm.clientHeight, newHeight;
+    (function run(){
+        newHeight = elm.clientHeight;
+        if( lastHeight != newHeight )
+            callback();
+        lastHeight = newHeight;
+
+        if( elm.onElementHeightChangeTimer )
+            clearTimeout(elm.onElementHeightChangeTimer);
+
+        elm.onElementHeightChangeTimer = setTimeout(run, 200);
+    })();
+}
+
+
+onElementHeightChange(document.body, function(){
+    stickyFoot();
+});
 
 $('.panel, .collapse').on('shown.bs.collapse', function (e) {
    stickyFoot();