JS文本框默认值处理详解

　　<script type="text/javascript">

　　function txtFocus(el) {

　　if (el.defaultValue == el.value) { el.value = ''; el.style.color = '#000'; }

　　}

　　function txtBlur(el) {

　　if (el.value == '') { el.value = el.defaultValue; el.style.color = '#666'; }

　　}

　　</script>

　　<asp:TextBox ID="txtBookPerson" runat="server" CssClass="text2" style="color:#666;" onfocus="txtFocus(this)" onblur="txtBlur(this)" value='请输入预定人' ></asp:TextBox>