Issue with getElementById 2

[Sleidia]

Below is a clumsy (but working) attempt of getting the offsetTop of an element that is repeated many times within the document.

The question is : was there another simpler method, without the need of a loop for instance?

document.onmousemove = function(ev){

    if (currenttable && currenttable.dragObject) {
    
    var elems = currenttable.dragObject.getElementsByTagName('div');

        for (var i=0; i<elems.length; i++) {

         		if (elems[i].getAttribute( 'id' ) == 'bottom-area') {

         		currenttable_height = elems[i].offsetTop;
         		
         		}         		

        }

I've tried
var elem = currenttable.dragObject.getElementById('bottom-area');
but it throws an error ("... is not a function")

Thanks!

 

[ggriffit]

if it the bottom-area is a unique ID then you should be able to use document.getElementById as per

http://www.tizag.com/javascriptT/javascript-getelementbyid.php.

Greg Griffiths
Livelink Certified Developer & ECM Global Star Champion 2005 & 2006

http://www.greggriffiths.org/livelink/

 

[Sleidia]

Hello,

Nope, it's not an unique ID.
How do I do in that case?

 

[ggriffit]

the ID property should be unique on the document -

http://webdesign.about.com/od/css/f/blfaqmultiIDs.htm

Greg Griffiths
Livelink Certified Developer & ECM Global Star Champion 2005 & 2006

http://www.greggriffiths.org/livelink/

 

[feherke]

Hi

[tt]id[/tt] must be unique. If it is not unique, make it a [tt]class[/tt] instead and see thread216-1534478 about some related discussion.

Feherke.

http://rootshell.be/~feherke/