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POError when calling JavaScript function — "can't find variable"
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8957675
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8957713
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2
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5
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2012-01-21T23:35:27.260
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0
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2012-01-21T23:43:05.537
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0
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1162928
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0
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1
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3
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8846
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text
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<p>I'm attempting to complete and exercise from the JavaScript Bible, and am having trouble getting my script to function.</p> <p>The assignment is to create a page that allows users to query a planet's name, and, via a script that matches the planet's name with its data stored in the associate arrays, call up its distance and diameter information.</p> <p>I'm attempting to call the function 'getPlanetInfo' via a button (onclick='getPlanetInfo()'). However, my error console reports that it cannot find a variable named 'getPlanetInfo' when I attempt to run it.</p> <p>I've attached both my JS and HTML code below. Any idea as to why my function isn't being properly called would be hugely appreciated.</p> <p>HTML:</p> <pre><code><!DOCTYPE html> <html> <head> ... <script type="text/javascript" src="planets.js"></script> </head> <body> <h1>Check a planet's distance from the sun and its diameter!</h1> <form> <input type="text" name="entry" id="entry"> <input type="button" value="Check it!" onClick="getPlanetInfo()"> </form> </body> </html> </code></pre> <p>JS:</p> <pre><code>var planetNames = new Array(4); planetNames[0] = "Mercury"; planetNames[1] = "Venus"; planetNames[2] = "Earth"; planetNames[3] = "Mars"; var planetDistances = new Array(4); planetDistances[0] = "36 million miles"; planetDistances[1] = "67 million miles"; planetDistances[2] = "93 million miles"; planetDistances[3] = "141 million miles"; var planetDiameters = new Array(4); planetDiameters[0] = "3,100 miles"; planetDiameters[1] = "7,700 miles"; planetDiameters[2] = "7,920 miles"; planetDiameters[3] = "4,200 miles"; function getPlanetInfo() { var selectedPlanet = document.getElementById("entry").value; for (var i = 0; i < planetNames.length; i++) { if (planetNames[i] == selectedPlanet) { break; } } if (i < planetNames.length) { alert(selectedPlanet + " is " + planetDistances[i] " in distance from the Sun and " + planetDiameters[i] + "in diameter.") } else { alert("Sorry, " + selectedPlanet + " isn't in the database."); } } </code></pre>
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Error when calling JavaScript function — "can't find variable"
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