select option element onclick?

[Christopher Benson-Manica]

Apparently you can't use the onclick event handler for specific
options in a select element in IE - is that correct? If so, is there
a way to get the same functionality out of it? What I want to do is
have a select box where you can select multiple elements without
holding down the control key; when you click on an option, you toggle
its selected property. How can I do that?

 

[Matt Kruse]

What I want to do is
have a select box where you can select multiple elements without
holding down the control key; when you click on an option, you toggle
its selected property. How can I do that?

This can be done by storing the selected options, and re-selecting each time
the user clicks.
For an example, see:
http://www.mattkruse.com/temp/easier-multi-select.html