Ha. It seems that using transparency in IE for the backgrounds on
td/th, REALLY REALLY slows the rendering down.
My timings are pretty much the same on IE and FF.
On 24/01/2008, Tobie Langel <[EMAIL PROTECTED]> wrote:
>
> Hi,
>
> Google for event delegation, and code something like this:
>
> $$('table.MTABLE').each(function(table) {
> table.observe('mouseover', function(event) {
> var element = event.findElement('tr');
> if (!element) return;
> element.up('tr').down('th span').addClassName('valVEH'); //not
> sure about this withot seeing the HTML
> event.stop();
> });
>
> table.observe('mouseout', function(event) {
> var element = event.findElement('tr');
> if (!element) return;
> element.up('tr').down('th span').removeClassName('valVEH'); //not
> sure about this withot seeing the HTML
> event.stop();
> });
> });
>
> Also, as a sidenode, perf is greatly improved by specifying the
> tagName of the element you're selecting whenever possible.
>
> So $$('div.bar') is a lot faster than $$('.bar');
>
> Best,
>
> Tobie
>
> Richard Quadling wrote:
> > On 23/01/2008, Justin Perkins <[EMAIL PROTECTED]> wrote:
> > >
> > > I have noticed huge performance problems in IE when doing what should
> > > be a simple operation, like: $$('body')
> > >
> > > It's instantaneous in Firefox, and dog-slow in IE.
> > >
> > > -justin
> >
> > I agree.
> >
> > I am using ...
> >
> > if (!Prototype.Browser.IE) {
> > $$('.MTABLE tbody tr').invoke('observe', 'mouseover', function(e) {
> > e.element().up('tr').down('th span').addClassName('valVEH');
> > }).invoke('observe', 'mouseout', function(e) {
> > e.element().up('tr').down('th
> > span').removeClassName('valVEH');
> > });
> > }
> >
> > to add a highlight to a span in a TH when the mouse moves over
> > anything in that row.
> >
> > Works as expected and more or less instantly in FF. In IE it takes 2
> > seconds (more or less).
> >
> >
> > How do I generate timings?
> >
> >
> > --
> > -----
> > Richard Quadling
> > Zend Certified Engineer : http://zend.com/zce.php?c=ZEND002498&r=213474731
> > "Standing on the shoulders of some very clever giants!"
> >
>
--
-----
Richard Quadling
Zend Certified Engineer : http://zend.com/zce.php?c=ZEND002498&r=213474731
"Standing on the shoulders of some very clever giants!"
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