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JavaScript运行时错误：“ $”未定义

[英]JavaScript runtime error: '$' is undefined

 原文  2013-06-05 17:47:19  3   5    javascript/ c#/ jquery/ visual-studio-2012

问题描述

Can someone help with this error in my code. 有人可以帮助解决我的代码中的错误。 I get this error when i start the website in Internet Explorer: 在Internet Explorer中启动网站时出现此错误：

JavaScript runtime error: '$' is undefined JavaScript运行时错误：“ $”未定义

This is the code please help me what i need to change in the java script? 这是代码，请帮助我我需要在Java脚本中更改什么？ 

<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default.aspx.cs" Inherits="_Default" %>

<!DOCTYPE html>

<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<title></title>

<style type="text/css">
    div.world_map_container #transparent_map {
        border: medium none;
        height: auto;
        position: absolute;
        width: auto;
        z-index: 30;
    }

    ul li {
        display: none;
        position: absolute;
        text-indent: -9999px;
        z-index: 20;
    }


    #home_resen {
        background: url("Sliki/resen.gif") no-repeat;
        height: auto;
        right: 0;
        top: 0;
        width: auto;
    }

    #home_skopje {
        background: url("Sliki/skopje.gif") no-repeat;
        height: auto;
        right: 0;
        top: 0;
        width: auto;
    }

    #home_kocani {
        background: url("Sliki/kocani.gif") no-repeat;
        height: auto;
        right: 0;
        top: 0;
        width: auto;
    }
  </style>
  </head>
  <body>
  <form id="form1" runat="server">
    <div class="world_map_container">
        <img src="Sliki/map.jpg" usemap="#the_world_map" id="transparent_map" />
        <map name="the_world_map" id="the_world_map">
            &nbsp;<area shape="poly" coords="167,335,168,321,166,318,161,313,156,308,148,308,146,304,143,302,137,301,136,293,133,283,130,277,127,273,127,270,129,266,133,261,133,253,132,248,128,242,124,240,121,240,118,243,114,248,108,254,100,258,94,261,92,261,91,268,87,274,83,279,81,281,81,286,81,291,81,295,75,298,69,304,67,308,66,316,69,318,79,319,86,319,88,321,91,324,94,326,100,325,102,322,103,317,100,315,95,314,88,312,85,308,87,303,90,300,94,297,98,294,104,293,109,293,113,295,119,303,124,311,127,318,130,327,131,335,132,338,135,336,140,332,144,331,148,331,151,333,155,336,162,336,167,335" href="Default2.aspx" id="area_resen" alt="Resen" />
            <area shape="poly" coords="171,45,167,47,161,47,162,50,167,50,167,53,164,55,157,64,161,68,169,88,172,89,175,102,175,105,179,105,180,109,187,116,187,118,202,121,202,124,212,124,216,121,216,116,245,116,253,113,255,110,254,104,253,103,259,103,265,104,269,105,272,103,272,95,274,90,277,87,282,86,285,84,287,78,288,76,280,75,274,74,270,72,265,67,263,63,257,63,254,60,251,57,250,56,247,57,241,56,237,55,234,52,229,49,227,44,227,38,231,35,233,33,231,31,226,29,225,28,225,21,220,20,216,22,213,24,212,26,210,28,207,28,205,26,202,26,200,28,199,31,196,33,192,39,188,43,189,45,189,47,185,50,179,52,175,52,172,50,171,47,171,45" href="Default2.aspx" id="area_skopje" alt="Skopje" />
            <area shape="poly" coords="397,47,388,47,383,56,384,61,384,66,382,70,379,71,375,71,375,76,373,82,372,88,372,94,377,96,389,109,408,109,409,98,405,92,409,89,406,80,412,80,421,77,424,74,423,68,429,66,425,63,415,53,398,53,397,47" href="Default2.aspx" id="area_kocani" alt="Kocani" />
        </map>
        <ul>
            <li id="resen"><a href="#">resen</a></li>
            <li id="skopje"><a href="#">skopje</a></li>
            <li id="kocani"><a href="#">kocani</a></li>
        </ul>
    </div>
    <script type="text/javascript">
        $('.world_map_container area').each(function () {
            // Assigning an action to the mouseover event
            $(this).mouseover(function (e) {
                var country_id = $(this).attr('id').replace('area_', 'home_');
                $('#' + country_id).css('display', 'block');
            });

            // Assigning an action to the mouseout event
            $(this).mouseout(function (e) {
                var country_id = $(this).attr('id').replace('area_', 'home_');
                $('#' + country_id).css('display', 'none');
            });

        });
    </script>
</form>

5 个解决方案

解决方案1
 13 已采纳  2013-06-05 17:48:16

You have not included jquery in your file. 您尚未在文件中包含jquery 。

Something like this: 像这样： 

<script src='http://code.jquery.com/jquery-latest.min.js' type='text/javascript'></script>

Or if you have it already in your source files, include it from there. 或者，如果您的源文件中已经有它，则从那里包括它。

解决方案2
 4  2013-06-05 17:49:09

您需要添加jQuery才能使用jQuery ，请参阅如何使用jQuery 

<script src='http://code.jquery.com/jquery-latest.min.js' type='text/javascript'></script>

解决方案3
 3  2013-06-05 17:48:33

确保您使用脚本标记引用jquery

解决方案4
 0  2016-11-06 16:50:48

IE 11中出现此错误，因为在链接到Jquery库之前先链接到自定义JQuery文件。

解决方案5
 -1  2016-02-08 13:02:44

I would suggest you to try this. 我建议您尝试一下。 Your internet explorer settings might not be allowing you to download the jquery files. 您的Internet Explorer设置可能不允许您下载jquery文件。

  1. Click Internet Options. 单击“ Internet选项”。
  2. Switch to tab Security, and then click Custom level... 切换到“安全性”选项卡，然后单击“自定义级别...”。
  3. Scroll down in the list of settings until you see the section Downloads. 在设置列表中向下滚动，直到看到“下载”部分。
  4. Set all download options in this section to Enabled. 将本节中的所有下载选项设置为“已启用”。
  5. Click OK to save the settings. 单击确定以保存设置。

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