trying to identify whether a particular iframe is existing in a page

[Revathi Balakrishnan]

i have used the below code to find out , whether the below named "rightnav" iframe is existing. But when i use this code it throws object required error. Expecting your help on this

<script lanquage="Javascript">


if(window.document.getElementById('1').title=="rightnav")
alert("got it");




</script>


<iframe id=1 title="rightnav"src="http://www.google.com"></iframe>

[acoder]

There are two problems. One is that you're testing before the iframe even appears in the source. Secondly, by using a property to test, you're assuming the object already exists.

To test the existence of an element/object, use something like:
[code=javascript]if (document.getEl ementById("ifra meID")) {
...[/code]onload, i.e. after all elements have loaded.

There are two other problems with your code. One is that the script language attribute is deprecated. Use the type attribute instead: type="text/javascript". Secondly, IDs should not begin with a number.

Finally, please use code tags when posting code. See How to Ask a Question. Thanks.

[Revathi Balakrishnan]

hi i have understood my problem in the previous question, i have modified my my code but still i am getting "variable has no properties error", hope you would give me your valuable advice.


To automatically refresh all the iframes in my web page


i have tried to get my iframes's name in a variable called nam, and using that variable i am trying to refresh it, but i am getting nam.location.re load is null or not an object error in Ie, in firefox i am getting nam.location has no properties error.

<script  type="text/JavaScript">

function refreshme()
{


for(i=0; (a = document.getElementsByTagName("iframe")[i]); i++) 
{
  
nam=a.getAttribute('name');

alert(nam);

if(nam)

 nam.location.reload();

}

}
</script>
	
		
		<a  href="#" onClick="javascript:refreshme();"> refresh</a>
		<iframe src="http://www.google.com" name="doc"></iframe>

          <iframe src="http://www.w3schools.com" name="doc1"></iframe>

i could get an alert, the alert properly gives me the frame name, and using doc.location.re load(); is also working for me, but i am not able to make use of the variable which has the frame name to refresh the the same frame.

[acoder]

nam is the name of the frame, not the frame itself. That's what you've set as variable a. So use a.location.relo ad() instead.

PS. for code tags use square brackets [], not the angle brackets, <>.

[Revathi Balakrishnan]

"a.location.rel oad" does not work,
but a.contentWindow .location.reloa d();
works fine.

Thanks for the help. really happy to a memeber of this forum.

[acoder]

"a.location.rel oad" does not work,
but a.contentWindow .location.reloa d();
works fine.

That would be for IE. If you want cross-browser code in one line, use window.frames[frameName] syntax.

Thanks for the help. really happy to a memeber of this forum.

Glad to hear it!