Javascript Form - 如何處理TextArea鍵向上/向下鍵/鍵按下事件
我們想知道如何處理TextArea鍵向上/向下鍵/鍵按下事件。
<HTML>
<HEAD>
<SCRIPT LANGUAGE=JavaScript>
function DisplayEvent(eventName){
var myMessage = window.document.form1.textarea1.value;
myMessage = myMessage + eventName;
window.document.form1.textarea1.value = myMessage;
} </SCRIPT>
</HEAD>
<BODY>
<FORM NAME=form1>
<TEXTAREA ROWS=15 COLS=40 NAME=textarea1
onchange="DisplayEvent('onchange\n');"
onkeydown="DisplayEvent('onkeydown\n');"
onkeypress="DisplayEvent('onkeypress\n');"
onkeyup="DisplayEvent('onkeyup\n\n');">
press your key here.
</TEXTAREA>
<INPUT TYPE="button" VALUE="Clear Event TextArea"
NAME=button1 onclick="window.document.form1.textarea1.value=''"> </FORM>
</BODY>
</HTML>
The code above is rendered as follows:
【textarea】
