Differences in the performance of option elements in various javascript browsers _ form Effects

The performance of option elements in javascript browsers varies. For more information, see. 1. There are no events (such as click and mouseover) in IE6, IE6, 7/8, and ie9, while Firefox, Safari, Chrome, and Opera do.

The Code is as follows:

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Example:

12

2. Click option and use srcElement to obtain the event source target. select is in IE, and option is in Firefox/Safari/Chrome/Opera.

The Code is as follows:

1
Script
Document. getElementById ('s2 '). onclick = function (e ){
Var evt = window. event | e;
Var target = evt. srcElement | evt.tar get;
Alert (target. tagName );
}
Script

Example:

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