<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>无标题文档</title>
<script>
window.onload=function ()
{
var oBtn=document.getElementById('btn1');
var oTxt1=document.getElementById('txt1');
var oTxt2=document.getElementById('txt2');
oBtn.onclick=function ()
{
oTxt1.value+=oTxt2.value+'\n';//换行
oTxt2.value='';//清空输入框
};
oTxt2.onkeydown=function (ev)
{
var oEvent=ev||event;//事件处理兼容
if(oEvent.keyCode==13)//取键盘的回车事件
{
oTxt1.value+=oTxt2.value+'\n';
oTxt2.value='';
}
};
};
</script>
</head>
<body>
<textarea id="txt1" rows="10" cols="40"></textarea><br />
<input id="txt2" type="text" />
<input id="btn1" type="button" value="留言" />
</body>
</html>
