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GetElementsBy
Topic Started: Jan 16 2005, 09:28 AM (389 Views)
kingy Jan 16 2005, 09:28 AM Post #1
1 in 10 people understands binary, the other 1 doesn't
[ * * * * * * ]
 what is this command in javascript? i see it all the time in IF but i don't get what it does..if somebody could talk me thoruhg it i would appreciate it.

i have looked on the web but i would like to know what its effect is in the context of IF

thanks for any help
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Stefan Jan 16 2005, 02:36 PM Post #2
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Mew?
[ * * * * * * * ]
 getElementsByTagName() gets the elements with a certain tag contained by an element... Uhm.... Maybe an example will explain it better.

For instance, this:

Code:
 
e = document.getElementsByTagName('DIV')

Assigns an array with all DIV elements from the document object to the e variable...

Sorry, I'm terrible at explaining things >_<
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kingy Jan 16 2005, 03:11 PM Post #3
1 in 10 people understands binary, the other 1 doesn't
[ * * * * * * ]
 but why is this useful in IF codes? i don't see what you could do with that

sorry if i am being stupid
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Stefan Jan 16 2005, 04:10 PM Post #4
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Mew?
[ * * * * * * * ]
 Well, for instance, the mini profile at posts is a <span> element, with the "postdetails" class attribute.
To loop through all mini profiles on a page, you could use something like this:

Code:
 
<script type='text/javascript'>
<!--
e = document.getElementsByTagName('SPAN') // get all SPAN elements
for (n = 0; n < e.length; n++) { // loop through all those span elements
  if (e[n].className == 'postdetails') { // test for 'postdetails' class name
     // do your stuff here with the span element if it has the 'postdetails' class name
  }
}
// -->
</script>
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kingy Jan 16 2005, 04:33 PM Post #5
1 in 10 people understands binary, the other 1 doesn't
[ * * * * * * ]
 oh i get it now.

cheers stefan
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