onScroll事件为何触发三次?
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML>
<HEAD>
<TITLE> New Document </TITLE>
<META NAME="Generator" CONTENT="EditPlus">
<META NAME="Author" CONTENT="">
<META NAME="Keywords" CONTENT="">
<META NAME="Description" CONTENT="">
</HEAD>
<BODY>
<TEXTAREA NAME="" ROWS="45" COLS="" onscroll="alert('OK');return false;">
ihewotgir
eurey9ortkhp
r;iuojytpj
</TEXTAREA>
</BODY>
</HTML>
以上页面,为何单击 TEXTAREA 的滚动条一次,会执行 alert('OK') 语句三次,请高人指点!!!