<html>
<head>
<script>
function test1() {
var textarea = document.getElementById('talkContent');
textarea.scrollTop = textarea.scrollHeight;
}
function test2() {
var textarea = document.getElementById('talkContent');
textarea.scrollTop = 0;
}
</script>
</head>
<body>
<textarea rows="10" cols="15" name="a" id="talkContent"
onpropertychange="this.scrollTop=this.scrollHeight"
οnfοcus="this.scrollTop=this.scrollHeight" >
ttttttt11111
ttttttt11111
ttttttt11111
ttttttt11111
ttttttt11111
ttttttt11111
ttttttt11111
ttttttt11111
ttttttt11111
ttttttt11111
ttttttt11111
ttttttt11111
</textarea>
<input type = "button" onclick="test1()" value="至底部" />
<input type = "button" onclick="test2()" value="至頂部" />
</body>
</html>
