javascript textarea word limit_form effects

This one is to read the value of the maxlength attribute of textarea and perform calculations. The idea is good, but it is troublesome to modify. However, it is a good reference for js enthusiasts. It can be controlled by reading the attribute value.

<meta http-equiv="Content-Type" content="text/html; charset=GB2312"> <title>Textarea character limit. There are many reference networks for practice codes by ahuinan</title> <textarea rows="10" cols="60" onpropertychange="TextUtil.NotMax(this)" maxlength="3">