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POJavaScript error in IE7 & IE8: SCRIPT5007: Unable to get the value of property 'newQuestion': object is null or undefined
 

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  1. POJavaScript error in IE7 & IE8: SCRIPT5007: Unable to get the value of property 'newQuestion': object is null or undefined
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    <p>I've been looking all over and can't come up with a solution. The following code works perfectly in IE9, Chrome, FF, and Safari. However, when you hit "Start" in IE7 or IE8 you get the following error:</p> <pre><code>SCRIPT5007: Unable to get the value of property 'newQuestion': object is null or undefined </code></pre> <p>The code at issue is here:</p> <pre><code>//This is used to reduce some code size and not type document.getElementById(a) each time function DOMelem(a) { return document.getElementById(a); } //This is used to round numbers function roundTo(a,b) { a=a*Math.pow(10,b); a=Math.round(a); a=a/Math.pow(10,b); return a; } //The quiz object function sQuiz(a,c,init) { //This part is used to get the variable used by the user this.getName=function() { for(var v in window) { if(window[v] instanceof sQuiz) { this.varName=v; } } }, //This will create the first page of the quiz this.createQuiz=function() { this.getName(); DOMelem(a).innerHTML="&lt;h1&gt;"+init.intro.qTitle+"&lt;/h1&gt;"; DOMelem(a).innerHTML+="&lt;h2&gt;"+init.intro.qAuthor+"&lt;/h2&gt;"; DOMelem(a).innerHTML+="&lt;h3&gt;"+init.intro.qComments+"&lt;/h3&gt;&lt;br /&gt;&lt;br /&gt;"; DOMelem(a).innerHTML+="&lt;input type='button' value='Start' onClick='"+this.varName+".newQuestion(0)'&gt;"; }, //This one will create a random id for the quiz and create a bar for it this.createBar=function() { id="12391023103091"+Math.round(Math.random()*12391023103091); id=id.substr(id.length-14,14); this.randBarId=id; DOMelem(c).innerHTML="&lt;div class='progress_full' id='pro_"+id+"'&gt;&lt;div class='progress_bar' style='width:0%;' id='bar_"+id+"'&gt;&lt;/div&gt;&lt;/div&gt;"; }, //In this section we check to see if there's a bar, if we must show the results or just show the interface. this.newQuestion=function(index) { //Create the bar if it does not exist if(!DOMelem("pro_"+this.randBarId)||!DOMelem("bar_"+this.randBarId)) { eval(this.varName+".createBar()"); } //Show the results page if(index&gt;=init.questions.length) { eval(this.varName+".showResults()"); } //Show the question interface else { DOMelem(a).innerHTML="&lt;h1&gt;"+init.questions[index].question+"&lt;/h1&gt;"; for (var i=0;i&lt;init.questions[index].answers.length;i++) { DOMelem(a).innerHTML+="&lt;input type='button' name='"+index+"_"+i+"' value='"+init.questions[index].answers[i]+"' onClick='"+this.varName+".checkAnswer("+index+","+i+")'&gt;"; } DOMelem(a).innerHTML+="&lt;input type='submit' id='btn_"+this.randBarId+"' value='Next Question' onClick='"+this.varName+".changeQuestion("+index+")' disabled&gt;"; DOMelem("bar_"+this.randBarId).style.width=(((index+1)/init.questions.length)*100)+"%"; } }, //This is used when the user clicks to change the question this.changeQuestion=function(index) { return this.newQuestion(index+1); }, //This part handles when the user clicks on an answer, color it, un-disable the button and record the guess this.checkAnswer=function(index,i) { init.questions[index].guessed=i; var inputs=document.getElementById(a).getElementsByTagName("input"); for(var j=0;j&lt;inputs.length;j++) { document.getElementById(a).getElementsByTagName("input")[j].className=""; if(inputs[i].name==index+"_"+i) { document.getElementById(a).getElementsByTagName("input")[i].className="selected"; } } DOMelem("btn_"+this.randBarId).disabled=false; }, //This one here shows the result of the quiz. this.showResults=function() { DOMelem(a).innerHTML="&lt;h1&gt;Results of "+init.intro.qTitle+"&lt;/h1&gt;"; var count=0; for(var i=0;i&lt;init.questions.length;i++) { if(init.questions[i].guessed==(init.questions[i].correctAnswer-1)) { count++; DOMelem(a).innerHTML+="&lt;div id='answer' class='correct'&gt;&amp;radic; Question "+(i+1)+"&lt;/div&gt;"; } else { DOMelem(a).innerHTML+="&lt;div id='answer' class='wrong'&gt;&amp;times; Question "+(i+1)+"&lt;/div&gt;"; } } var result=roundTo((count/init.questions.length)*100,2); DOMelem(a).innerHTML+="&lt;h3 style='clear:both'&gt;&lt;br /&gt;"+result+"% correct answers.&lt;/h3&gt;"; var tweet=init.tweetText.replace(/--score--/gi,result+"%"); tweet=tweet.replace(/ /gi,'+'); tweet="https://www.twitter.com/share?text="+tweet; DOMelem(a).innerHTML+="&lt;a href='"+tweet+"'&gt;Tweet it&lt;/a&gt;"; } } </code></pre> <p>You can view a demo <a href="http://ktbaker.com/quiz" rel="nofollow">here</a>.</p> <p>I really think I've read about every related question, but still can't come up with a solution. Please let me know if any additional information would be helpful.</p> <p>UPDATE:</p> <p>To clarify, I am testing in IE9 with compatibility mode turned on. If anyone actually has IE7 or IE8 installed, I would live to know your results. Anyway, the code seems to execute up until here:</p> <pre><code> //This will create the first page of the quiz this.createQuiz=function() { this.getName(); DOMelem(a).innerHTML="&lt;h1&gt;"+init.intro.qTitle+"&lt;/h1&gt;"; DOMelem(a).innerHTML+="&lt;h2&gt;"+init.intro.qAuthor+"&lt;/h2&gt;"; DOMelem(a).innerHTML+="&lt;h3&gt;"+init.intro.qComments+"&lt;/h3&gt;&lt;br /&gt;&lt;br /&gt;"; DOMelem(a).innerHTML+="&lt;input type='button' value='Start' onClick='"+this.varName+".newQuestion(0)'&gt;"; }, </code></pre> <p>Once the start button is clicked, I get an error because <code>this.varName</code> returns as <code>undefined</code>.</p>
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    1. This table or related slice is empty.
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    1. This table or related slice is empty.
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      1. POJavaScript error in IE7 & IE8: SCRIPT5007: Unable to get the value of property 'newQuestion': object is null or undefined
      1. This table or related slice is empty.
      1. VTUpMod
    1. COCan you reduce this to the minimum possible that still shows the error?
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      1. POJavaScript error in IE7 & IE8: SCRIPT5007: Unable to get the value of property 'newQuestion': object is null or undefined
      1. USRobG
    2. CODoes that help at all?
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      1. POJavaScript error in IE7 & IE8: SCRIPT5007: Unable to get the value of property 'newQuestion': object is null or undefined
      1. USARP
    3. COUsing IE 9 in compatability mode is related to page layout and formatting, I don't think it makes any change to the script engine. Can you post a working snippet that shows the error?
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      1. POJavaScript error in IE7 & IE8: SCRIPT5007: Unable to get the value of property 'newQuestion': object is null or undefined
      1. USRobG
 

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