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check id exists

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Sep 22.2010

Hi guys,

I’m trying the figure out how to check if a id exists.

I have tried this;

if(document.getElementById(“theID”)
Then do this

But that doesn’t seem to work.

All I want to do is if it doesn’t exist then don’t run the function.

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JavaScript

5 Comments(s) ↴

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@JonaSep 22.2010 — [font=arial]Hi,

Convert it to a Boolean value. Here's the shortest way I can think of:[/font]

<i>
</i>if (!!document.getElementById('theID')){
// the element exists
} else {
// not found
}
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@MrRedSep 22.2010 — I am sure I have done it (thanks to Dreamweaver functions) without converting to boolean per se.

see various pages on http://cresby.com for examples. the function that uses it is findObj{blah,blah}

Best of luck.
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@JavaboeySep 22.2010 — if you used if(document.getElementById("theID"), which is copy/paste from your post, then you have a type-o. You left the last parenthesis off. Should be:

if (document.getElementById("theID"))

It will work just fine.
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@tecmeisterauthorSep 22.2010 — if you used if(document.getElementById("theID"), which is copy/paste from your post, then you have a type-o. You left the last parenthesis off. Should be:

if (document.getElementById("theID"))

It will work just fine.[/QUOTE]

I didn't copy and paste it I just typed it quick as a example and it didn't work. I have tried what the others have said and it works
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@JavaboeySep 22.2010 — Just FYI, it works. I tried it before I posted my first reply.
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