设定文本框焦点失去1秒后只读

<input type=”text” id=”inputArea” value=”这是显示的值” onfocus=”setTimeout(‘disableInput(\”+this.id+’\’)’,1000);”>
<script language=”javascript”>
function disableInput(n)
{
document.getElementById(n).readOnly = true;
document.getElementById(n).blur();
}
</script>