title: JavaScript runtime error: '$' is undefined
body: <p>Can someone help with this error in my code. I get this error when i start the website in Internet Explorer:</p>
  
  <blockquote>
    <p>JavaScript runtime error: '$' is undefined</p>
  </blockquote>
  
  <p>This is the code please help me what i need to change in the java script?</p>
  
  <pre><code>&lt;%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default.aspx.cs" Inherits="_Default" %&gt;
  
  &lt;!DOCTYPE html&gt;
  
  &lt;html xmlns="http://www.w3.org/1999/xhtml"&gt;
  &lt;head runat="server"&gt;
  &lt;title&gt;&lt;/title&gt;
  
  &lt;style type="text/css"&gt;
      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;
      }
    &lt;/style&gt;
    &lt;/head&gt;
    &lt;body&gt;
    &lt;form id="form1" runat="server"&gt;
      &lt;div class="world_map_container"&gt;
          &lt;img src="Sliki/map.jpg" usemap="#the_world_map" id="transparent_map" /&gt;
          &lt;map name="the_world_map" id="the_world_map"&gt;
              &amp;nbsp;&lt;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" /&gt;
              &lt;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" /&gt;
              &lt;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" /&gt;
          &lt;/map&gt;
          &lt;ul&gt;
              &lt;li id="resen"&gt;&lt;a href="#"&gt;resen&lt;/a&gt;&lt;/li&gt;
              &lt;li id="skopje"&gt;&lt;a href="#"&gt;skopje&lt;/a&gt;&lt;/li&gt;
              &lt;li id="kocani"&gt;&lt;a href="#"&gt;kocani&lt;/a&gt;&lt;/li&gt;
          &lt;/ul&gt;
      &lt;/div&gt;
      &lt;script type="text/javascript"&gt;
          $('.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');
              });
  
          });
      &lt;/script&gt;
  &lt;/form&gt;
  </code></pre>
  
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