Problems with selecting in jquery Firefox3.5_jquery

There is a select element on the page with the id of customer. Many methods on the Internet that introduce jquery to reference the selected value of select use:

Copy code The code is as follows:

$("#customer option[selected]").val();

This method is used to get selcte selected The value of the item. I have always used it this way, but recently installed the official version of FF3.5 and found that this method cannot get the value under it, so I went to the jquery help document. In the document, the reference to select is used as follows:

Copy code The code is as follows:

$("#customer option:selected" ).val();

Using this method to reference will be normal under FF3.5.