Will I trigger a change event if I use Javascript to set a <option> as selected?

Setting an option as selected via JavaScript 或 通过聚焦选择一个选项,然后使用上下按钮进行选择,不被 onchange() event handler as evident by the following links :

• http://www.codingforums.com/archive/index.php/t-156699.html
• http://www.daniweb.com/forums/thread205638.html

PS: A similar situation occurred when i tried to evoke <element onmousedown="doStuff();"> 通过呼叫 element.click();

Setting any value for any field in JavaScript should not trigger any events.

If they did you would end up in an endless loop of events firing.

If you want, you can "call" the change event manually.

Yes, that should hold true. In my experience this works in IE 6 up, Chrome, FF and Safari. I would agree that testing in all browsers you intend supporting is sensible though !

option:selected yes it works I just used it myself. Even held true in IE 6 - IE 8 webkit and FF