drop down menu default options all selected

I was wondering how to have all the options in a drop menu (using select tags)开发者_如何学JAVA highlighted?

I already created a button to created a select all button to do this but I want the drop menu all selected by default when arriving on the page.

It would be great if it works for IE and firefox.

thanks

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If your select is multiple then any <option> that has selected="selected" will be highlighted by default.

http://www.w3schools.com/tags/tag_option.asp