It means that the 'th' you are looking at (which is only the first 'th' in each table) doesn't have a class of 'asc'.
http://docs.jquery.com/Core#index.28_subject_.29 It looks like you're trying to loop over each 'th' in each table try this: $(document).ready(function() { $("table.simple").each(function() { $('th',this).each(function(i) { if ( this.is('.asc') ) alert(i); }); }); }); Karl Rudd On 3/1/07, Jonathan Freeman <[EMAIL PROTECTED]> wrote: > I'm trying to get my head around this method and I'm getting results > unexpected results. I'm trying to get the index number of the th's that > have the '.asc' class. Any ideas why the second one is returning -1 ? > Thank you! :) > > <html> > <head> > <script src="jquery.js" type="text/javascript"></script> > <script> > $(document).ready(function() { > $("table.simple").each(function() { > var x = $('th',this).index($('.asc')[0]); > alert(x); > //first returns 2, as expected > //second returns -1, should it be 0? > }); > }); > </script> > </head> > > <body> > <table class="simple"> > <thead> > <tr> > <th>Column 1</th> > <th>Column 2</th> > <th class="asc">Column 3</th> > </tr> > </thead> > <tbody> > <tr> > <td>Data 1</td> > <td>Data 2</td> > <td>Data 3</td> > </tr> > </tbody> > </table> > <table class="simple"> > <thead> > <tr> > <th class="asc">Column 1</th> > <th>Column 2</th> > <th>Column 3</th> > </tr> > </thead> > <tbody> > <tr> > <td>Data 1</td> > <td>Data 2</td> > <td>Data 3</td> > </tr> > </tbody> > </table> > </body> > </html> > > > > > ____________________________________________________________________________________ > Don't pick lemons. > See all the new 2007 cars at Yahoo! Autos. > http://autos.yahoo.com/new_cars.html > > _______________________________________________ > jQuery mailing list > discuss@jquery.com > http://jquery.com/discuss/ > _______________________________________________ jQuery mailing list discuss@jquery.com http://jquery.com/discuss/
