<!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>楓芸志 » 在文字框的指定位置插入文字並定位游標</title>
<script type="text/javascript">
function InsertString(tbid, str){
var tb = document.getElementById(tbid);
tb.focus();
if (document.all){
var r = document.selection.createRange();
document.selection.empty();
r.text = str;
r.collapse();
r.select();
}
else{
var newstart = tb.selectionStart+str.length;
tb.value=tb.value.substr(0,tb.selectionStart)+str+tb.value.substring(tb.selectionEnd);
tb.selectionStart = newstart;
tb.selectionEnd = newstart;
}
}
function GetSelection(tbid){
var sel = '';
if (document.all){
var r = document.selection.createRange();
document.selection.empty();
sel = r.text;
}
else{
var tb = document.getElementById(tbid);
// tb.focus();
var start = tb.selectionStart;
var end = tb.selectionEnd;
sel = tb.value.substring(start, end);
}
return sel;
}
function ShowSelection(tbid){
var sel = GetSelection(tbid);
if (sel)
alert('選中的文字是：'+sel);
else
alert('未選擇文字！');
}
</script>
</head>
<body>
<form><textarea id="txtContent" cols="50" rows="5">先在本文框中點選滑鼠或選擇文字以確定游標位置和選取內容。</textarea><br /><br />
<input type = "button" value = "插入字串 {Good}" onclick="InsertString('txtContent', '{Good}');"/>
<input type = "button" value = "插入字串 {Bad}" onclick="InsertString('txtContent', '{Bad}');"/>
<input type = "button" value = "獲取選中的文字" onclick="ShowSelection('txtContent');"/><br />
<div id="tip"></div>
</form>
</body>
</html>