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06.15.2005 at 08:12AM PDT, ID: 21459007
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7.8

Javascript Check if Object Exists

Asked by phenixfilms in JavaScript

Tags: , , ,

I have a php script that creates a number of images in a table. Then i have a link that calls the following function. The function goes through and changes the images to different ones.

function changeLetter(letter)
{
      // go through 40 times //
      for (i = 0; i <= 5; i++)
      {
            if (document.getElementById(letter.'_'+i))
            {
            var myElem = document.getElementById(letter.'_'+i);
            myElem.src='images/'+letter+'.gif';
            }
      }
}

its wheel of fortune board. So there may I'm saying show all letter A's. Problem is if no letter A's exist it crashes, so i need to check if there is an image by the id before i try and set its properties.

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[+][-]06.15.2005 at 08:32AM PDT, ID: 14222527

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[+][-]06.15.2005 at 10:27AM PDT, ID: 14223729

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[+][-]06.15.2005 at 10:33AM PDT, ID: 14223785

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[+][-]06.15.2005 at 10:54AM PDT, ID: 14224001

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[+][-]06.15.2005 at 11:54AM PDT, ID: 14224628

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[+][-]11.04.2005 at 04:18AM PST, ID: 15223814

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[+][-]11.04.2005 at 08:13AM PST, ID: 15225414

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About this solution

Zone: JavaScript
Tags: javascript, check, exists, object
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Solution Provided By: ljo8877
Participating Experts: 4
Solution Grade: A
 
 
[+][-]11.04.2005 at 08:24AM PST, ID: 15225515

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[+][-]02.07.2006 at 03:57AM PST, ID: 15891315

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