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POi keep getting Uncaught ReferenceError: dropMenu is not defined and Uncaught TypeError: Cannot read property 'style' of null
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  1. POi keep getting Uncaught ReferenceError: dropMenu is not defined and Uncaught TypeError: Cannot read property 'style' of null
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    copied!<p>im trying to make nav bar with sub menus but i keeping getting dropMenu is not defined and when i hover over the two paris links i get Uncaught TypeError: Cannot read property 'style' of null any idea what is causing this here is my code html</p> <pre><code>&lt;html&gt; &lt;link type="text/css" rel="stylesheet" href="vacation.css"/&gt; &lt;head&gt; &lt;title&gt;Paris&lt;/title&gt; &lt;/head&gt; &lt;body&gt; &lt;div id="menus"&gt; &lt;div id ="parismenu"&gt; &lt;a href="#" onmouseover="dropMenu('dropmenu1')"&gt;Paris&lt;/a&gt; &lt;div id="dropmenu1" class="dropmenus"&gt; &lt;a href="#"&gt;apple&lt;/a&gt; &lt;/div&gt; &lt;/div&gt; &lt;div id ="disneymenu"&gt; &lt;a href="#" onmouseover="dropMenu('dropmenu2')"&gt;Paris&lt;/a&gt; &lt;div id="dropmenu2" class="dropmenus"&gt; &lt;a href="#"&gt;apple&lt;/a&gt; &lt;/div&gt; &lt;/div&gt; &lt;/div&gt; &lt;/body&gt; &lt;script type="text/javascript" src="//ajax.googleapis.com/ajax/libs/jqueryui/1.10.3/jquery-ui.min.js"&gt;&lt;/script&gt; &lt;script type="text/javascript" src="vacation.js"&gt;&lt;/script&gt; &lt;/html&gt; </code></pre> <p>css</p> <pre><code>div#menus{ margin-left:16px; } div#menus&gt; div{ float:left; margin:0px 20px; } div.dropmenus{ display:none; position:absolute; top:100px; width:120px; background:teal; z-index:2; padding:4px; border: blue 3px solid; border-top:none; border-radius:5px 5px 5px 5px; } div.dropmenus&gt;a{ display:block; margin:4px; padding:7px; font-size:14px; text-decoration:none; background:blue; border-radius:3px; color:red; } div#dropmenu1{ left:24px; } div#dropmenu2{ left:116px; } </code></pre> <p>javascript</p> <pre><code> var fade=function(){ return{ init:function(id,flag,target){ this.elem=document.ElementById(id); clearInterval(this.elem.si); this.target=target ? target : flag ? 100 : 0; this.flag = flag||1; this.alpha = this.elem.stle.opacity ? parseFloat(this.elem.style.opacity) * 100 : 0; this.elem.si=setIntterval(function(){fade.fadep()},20); }, fadep:function(){ if(this.alpha==this.target){ clearInterval(this.elem.si); } else{ var value=Math.round(this.alpha + ((this.target - this.alpha) * .05)) +(-1 * this.flag); this.elem.style.opacity=value/100; this.elem.style.filter='alpha(opacity=' + value + ')'; this.alpha=value }}}}(); var menu= ["dropmenu1","dropmenu2","dropmenu3"]; function dropMenu(x){ for(var m in menu){ if(menu[m] != x){ document.getElementById(menu[m]).style.display="none"; }} if(document.getElementById(x).style.diplay=="block"){ fade.init(x,1); } else{ fade.init(x,0)}} </code></pre>
 

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