diff --git a/static/mrdoc/mrdoc-docs.js b/static/mrdoc/mrdoc-docs.js
index 121a3da..34e051b 100644
--- a/static/mrdoc/mrdoc-docs.js
+++ b/static/mrdoc/mrdoc-docs.js
@@ -357,24 +357,26 @@ textBecomeImg = function(text,fontsize,fontcolor){
     // 搜索词高亮
     function keyLight(id, key, bgColor){
         // console.log(id,key,decodeURI(key))
-        key = decodeURI(key);
-        var oDiv = document.getElementById(id),
-        sText = oDiv.innerHTML,
-        bgColor = bgColor || "#c00",    
-        sKey = "<span name='addSpan' style='color: "+bgColor+";background:ff0;'>"+key+"</span>",
-        num = -1,
-        rStr = new RegExp(key, "ig"),
-        rHtml = new RegExp("\<.*?\>","ig"), //匹配html元素
-        aHtml = sText.match(rHtml); //存放html元素的数组
-        sText = sText.replace(rHtml, '{~}');  //替换html标签
-        // sText = sText.replace(rStr,sKey); //替换key
-        sText = sText.replace(rStr,function(text){
-            return "<span name='addSpan' style='color:#333;background:#ff0;'>"+text+"</span>"
-        }); //替换key
-        sText = sText.replace(/{~}/g,function(){  //恢复html标签
-                num++;
-                return aHtml[num];
-        });
-        oDiv.innerHTML = sText;
+        if(key != false){
+            key = decodeURI(key);
+            var oDiv = document.getElementById(id),
+            sText = oDiv.innerHTML,
+            bgColor = bgColor || "#c00",    
+            sKey = "<span name='addSpan' style='color: "+bgColor+";background:ff0;'>"+key+"</span>",
+            num = -1,
+            rStr = new RegExp(key, "ig"),
+            rHtml = new RegExp("\<.*?\>","ig"), //匹配html元素
+            aHtml = sText.match(rHtml); //存放html元素的数组
+            sText = sText.replace(rHtml, '{~}');  //替换html标签
+            // sText = sText.replace(rStr,sKey); //替换key
+            sText = sText.replace(rStr,function(text){
+                return "<span name='addSpan' style='color:#333;background:#ff0;'>"+text+"</span>"
+            }); //替换key
+            sText = sText.replace(/{~}/g,function(){  //恢复html标签
+                    num++;
+                    return aHtml[num];
+            });
+            oDiv.innerHTML = sText;
+        }
     };
     keyLight('doc-content',getQueryVariable("highlight"))
\ No newline at end of file