Summary of methods for synchronous input of two INPUTs Compatible with IE and Firefox_Form special effects

The first method can be implemented using onpropertychange. It only supports IE

<input type="text" id="ob_text_1" size="20" onpropertychange="copyob1toob2()"> <input type="text" id="ob_text_2" size="20">
[Ctrl A Select all Note: If you need to introduce external Js, you need to refresh to execute

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The second option can be using onkeydown Event binding. But there will be one less letter

<meta http-equiv="Content-Type" content="text/html; charset=gb2312"> <title> </title> <input id="s1" type="text" value=""> <input id="s2" type="text" value="">