Fixing #9 with a not-so-good solution

I shall detect the highest `zIndex` of the element's ancestors. This
isn't easy without jQuery since some `zIndex` is applied in CSS
selectors.

Also skip small windows from parsing since they are usually scripts from
other sites (such as Facebook) and don't even contain any chinese words.

LER.js

@@ -21,6 +21,10 @@ LER = function(){
         };
     }
     else var debug = function(){};
+    if(window.innerHeight < 50 || window.innerWidth < 100) {
+        debug("window too small, ignored.");
+        return;
+    }
 
     /// 數字補零（其實不是數字也沒關係）
     var zeroFill = function(num, strlen){
@@ -193,6 +197,10 @@ LER = function(){
                     : (document.body.offsetWidth - popup.offsetWidth)
                 ;
                 s.left = left + "px";
+                /* See #9
+                for(var p = self; p != document.body; p = p.parentNode)
+                    s.zIndex = Math.max(s.zIndex, p.style.zIndex);
+                */
                 var arrow = popup.firstChild;
                 arrow.style.marginLeft = x - left - (arrow.offsetWidth / 2) + "px";
             }, 350);
@@ -936,4 +944,4 @@ LER = function(){
         debugTime: function(str) {debug(str);}
     };
 }();
-LER.debugTime("initialization");
+if(typeof LER == "object" && LER.debugTime) LER.debugTime("initialization");

main.css

@@ -60,6 +60,7 @@
     margin: 0;
     padding: 0;
     text-align: left;
+    z-index: 1069;
 }
 
 .LER-popup-head {

manifest.json

@@ -2,10 +2,9 @@
 "manifest_version": 2,
 "name": "法規亦毒氣",
 "description": "將網頁中的法規與條號都轉變成連結，讓您快速查閱指定條文。",
-"version": "0.4.4.2",
-"permissions": [
-    "http://law.moj.gov.tw/"
-],
+"version": "0.4.4.3",
+"author": "kong0107",
+"homepage_url": "http://g0v.github.io/laweasyread-front/",
 "icons" : {"128": "icon.png"},
 "options_page": "options.html",
 "browser_action": {