<html> <head> <title>aaaaa</title> <script> function sendTo() { if(a2.innerText==""){ a2.innerText=a1.innerText; } else { a2.innerText +="\n"+a1.innerText; } a1.innerText = ""; } </script> </head> <body> <textarea id="a1">sdfsdfsdfsdfsdfd</textarea> <textarea id="a2"></textarea> <br /> <input type="button" value="發送" onclick="sendTo()" /> <body> </html>