長島冰茶的工程師筆記

原文： http://www.blueshop.com.tw/board/show.asp?subcde=BRD20091013141644BM5&fumcde=FUM20041006152641OLG

<form>
    <textarea name="textarea1" cols="50" rows="10"></textarea><br>
    <input type="button" value="test" onclick="insertMe(this)">
</form>
<script>
    function insertMe(btn)
    {
        var str = prompt("請輸入","");
        if (str == null || str.length == 0) return;
        var obj = btn.form.textarea1;
       
        if (document.selection)  //for ie
        {
            obj.focus();
            var sel =document.selection.createRange();
            sel.text = str;
        }
        else  //for firefox
        {
            var prefix = obj.value.substring(0, obj.selectionStart);
            var suffix = obj.value.substring(obj.selectionEnd);
            obj.value = prefix + str + suffix;
        }
    }
</script>