解决购物车页面弹出时，商品详情页会滚动的问题。 code review by BIKAI.

@@ -67,11 +67,12 @@ function show(html, cb) {
             document.documentElement.scrollLeft || document.body.scrollLeft,
             document.documentElement.scrollTop || document.body.scrollTop
         ],
-        $html = $('html'); // it would make more sense to apply this to body, but IE7 won't have that
+        $html = $('html, body'); // it would make more sense to apply this to body, but IE7 won't have that
 
     $html.data('scroll-position', scrollPosition);
     $html.data('previous-overflow', $html.css('overflow'));
     $html.css('overflow', 'hidden');
+    $html.css('height', '100%');
     window.scrollTo(scrollPosition[0], scrollPosition[1]);
 
     if (html) {
@@ -89,11 +90,12 @@ function show(html, cb) {
 
 //隐藏当前Panel
 function hide() {
-    var $html = $('html'),
+    var $html = $('html, body'),
         scrollPosition = $html.data('scroll-position');
 
     // un-lock scroll position
     $html.css('overflow', $html.data('previous-overflow'));
+    $html.css('height', 'auto');
     window.scrollTo(scrollPosition[0], scrollPosition[1]);
     $('.chose-panel').hide();
 }