<HTML>
<HEAD>
<SCRIPT>
function insertAtCaret (textEl, text) {
textEl.focus();
document.selection.createRange().text=text;
}
</SCRIPT>
</HEAD>
<BODY>
<FORM NAME="aForm">
<TEXTAREA NAME="aTextArea" ROWS="5" COLS="80" WRAP="soft">测试测试测试测试测试测试
</TEXTAREA>
<BR>
<INPUT TYPE="text" NAME="aText" SIZE="80" VALUE="要插入的文字">
<BR>
<INPUT TYPE="button" VALUE="insert" ONCLICK="insertAtCaret(this.form.aTextArea,this.form.aText.value);">
</FORM>
</BODY>
</HTML>
<HEAD>
<TITLE> 测试 </TITLE>
<script language="javascript">
function cc(po)
{
var e = event.srcElement;
var r =e.createTextRange();
r.moveStart('character',po);
r.collapse(true);
r.select();
}
</script></HEAD><BODY>
<form name="form1">
<input type=text name=text1 value="78456745675" onfocus="cc('5')">
</form>
</BODY>
</HTML>