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POPassing function results to another function variable in Javascript
 

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  1. POPassing function results to another function variable in Javascript
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    <p>Please forgive my ignorance, as I'm pretty new to Java script. Here is what I'm trying to do. I have a form where users can enter in data to get reimbursed. It sums totals up horizontally, and then takes the final values and adds them vertically for a grand total. I have everything working horizontally, and I can add the last 5 rows vertically, but when I add in the first two rows, it doesn't work. I get NaN for the answer. Here is the code.</p> <pre><code>&lt;script type="text/javascript"&gt; function calcWages(){ document.getElementById('wages').innerHTML = ''; var num2 = new Number(document.getElementById('hours').value); var num3 = new Number(document.getElementById('rate').value); document.getElementById('wages').innerHTML = ((num3 * num2).toFixed(2)); } function calcMilage(){ document.getElementById('milage').innerHTML = ''; var num4 = new Number(document.getElementById('miles').value); document.getElementById('milage').innerHTML = ((num4 * .555).toFixed(2)); } function calcTotal(){ document.getElementById('total').innerHTML = ''; var num5 = new Number(document.getElementById('wages').value); var num6 = new Number(document.getElementById('milage').value); var num7 = new Number(document.getElementById('travel').value); var num8 = new Number(document.getElementById('lodging').value); var num9 = new Number(document.getElementById('food').value); var num10 = new Number(document.getElementById('office').value); var num11 = new Number(document.getElementById('other').value); document.getElementById('total').innerHTML = (( num5 + num6 + num7 + num8 + num9 + num10 + num11).toFixed(2)); } window.onload=function(){ document.getElementById('totalCalc').onclick = calcTotal; } &lt;/script&gt; &lt;table&gt; &lt;tr&gt; &lt;td&gt;&lt;/td&gt; &lt;td&gt;&lt;/td&gt; &lt;td&gt;&lt;/td&gt; &lt;td&gt; Total: &lt;/td&gt; &lt;td&gt;&lt;/td&gt; &lt;td&gt; &lt;/td&gt; &lt;/tr&gt; &lt;tr&gt; &lt;td&gt;Wages:&lt;/td&gt; &lt;td&gt;Hours:(8 a day Max)&lt;input type="text" name="hours" id="hours" size="3" maxlength="3" onchange="calcWages()"&gt;&lt;/td&gt; &lt;td&gt;Rate:&lt;input type="text" name="rate" id="rate" size="3" maxlength="5" onchange="calcWages()"&gt;&lt;/td&gt; &lt;td&gt;=&lt;/td&gt; &lt;td&gt;&lt;div id="wages"&gt;&lt;/div&gt;&lt;/td&gt; &lt;/tr&gt; &lt;tr&gt; &lt;td&gt;Milage:&lt;/td&gt; &lt;td&gt;Miles&lt;input type="text" name="miles" id="miles" size="3" maxlength="4" onchange="calcMilage()"&gt;&lt;/td&gt; &lt;td&gt;IRS rate ($0.555)&lt;/td&gt; &lt;td&gt;=&lt;/td&gt; &lt;td&gt;&lt;div id="milage"&gt;&lt;/div&gt;&lt;/td&gt; &lt;/tr&gt; &lt;tr&gt; &lt;td&gt; Travel: &lt;/td&gt; &lt;td colspan="2"&gt; &lt;input type="text" name="tavelitem" id="travelitem" size="36"&gt; &lt;/td&gt; &lt;td&gt; = &lt;/td&gt; &lt;td&gt;&lt;input type="text" name="travel" id="travel" size="3"&gt; &lt;/td&gt; &lt;/tr&gt; &lt;tr&gt; &lt;td&gt;Lodging:&lt;/td&gt; &lt;td colspan="2"&gt;&lt;input type="text" name="lodgingitem" id="lodgingitem" size="36"&gt; &lt;/td&gt; &lt;td&gt;=&lt;/td&gt; &lt;td&gt;&lt;input type="text" name="lodging" id="lodging" size="3"&gt;&lt;/td&gt; &lt;/tr&gt; &lt;tr&gt; &lt;td&gt;Food:&lt;/td&gt; &lt;td colspan="2"&gt;&lt;input type="text" name="fooditem" id="fooditem" size="36"&gt; &lt;/td&gt; &lt;td&gt;=&lt;/td&gt; &lt;td&gt;&lt;input type="text" name="food" id="food" size="3"&gt;&lt;/td&gt; &lt;/tr&gt; &lt;tr&gt; &lt;td&gt;Office Supplies:&lt;/td&gt; &lt;td colspan="2"&gt;&lt;input type="text" name="officesupplies" id="officesupplies" size="36"&gt; &lt;/td&gt; &lt;td&gt;=&lt;/td&gt; &lt;td&gt;&lt;input type="text" name="office" id="office" size="3"&gt;&lt;/td&gt; &lt;/tr&gt; &lt;tr&gt; &lt;td&gt;Other:&lt;/td&gt; &lt;td colspan="2"&gt;&lt;input type="text" name="otheritem" id="otheritem" size="36"&gt;&lt;/td&gt; &lt;td&gt;=&lt;/td&gt; &lt;td&gt;&lt;input type="text" name="other" id="other" size="3"&gt;&lt;/td&gt; &lt;/tr&gt; &lt;tr&gt; &lt;td&gt;&lt;/td&gt; &lt;td&gt;&lt;button id="totalCalc"&gt;Total&lt;/button&gt;&lt;/td&gt; &lt;td&gt;Grand Total:&lt;/td&gt; &lt;td&gt;=&lt;/td&gt; &lt;td&gt;&lt;div id="total"&gt;&lt;/div&gt;&lt;/td&gt; &lt;/tr&gt; &lt;/table&gt; </code></pre> <p>The calcWages function and the calcMilage functions work, but I seem to be getting hung up and getting the results of those two, to work in the calcTotal function. I apologize if this doesn't make sense. Let me know, and I'll try to clarify. Thanks.</p>
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    1. COWhen you see yourself using variables names with a running index, using an array and/or a loop is likely to be a better solution: http://eloquentjavascript.net/chapter4.html.
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      1. POPassing function results to another function variable in Javascript
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    2. CODo you ever call `calcWages` and `calcMilage`, perhaps in the `onchange` handler of the elements they depend on?
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      1. POPassing function results to another function variable in Javascript
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    3. CO@FelixKling In this case, the variables are all just temporaries, it's not really array-like.
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      1. USBarmar
 

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