css - Retrieve width of embedded video using javascript -

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i have simple page embedded video. below example. want retrieve width of embedded video's iframe, can vary ( example if video youtube or vimeo ). can put div next it, text, , adjust width of latter accordingly

<html>   <head>   </head>       <body onload = "resizeelements()">     <iframe width="420" height="315" src="http://www.youtube.com/embed/a34qtcpnkww"     frameborder="0" allowfullscreen>     </iframe>     </body>     <script language="javascript" type="text/javascript">     function resizeelements()      {       var iframevideos = document.getelementsbytagname("iframe");       ( var = 0; < iframevideos.length; i++)        {         video = iframevideos[i];         alert ( ">" + video.style.width+ "<" );         video.style.width = "112px";         video.style.height = "63px";         alert ( ">" + video.style.width+ "<" );       }     }   </script> </html>

the page loaded, , first alert ( should have width of iframe ) shows "><", without width of video in between.

i sure it's not because video object null. following lines resize expected. after resizing, same alert brings correct width.

is there can have width available straight away?

i not big fan of libraries such jquery, happy consider in case 1 of them gives straight forward solution doesn't make more complicated parsing string inside tag. in case page needs maintenance in future...

thanks!

i think need set style attribute match width , height attributes:

<iframe style="width:420;height:315" width="420" height="315" src="http://www.youtube.com/embed/a34qtcpnkww"     frameborder="0" allowfullscreen>     </iframe>

because in function, working style attribute.


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