<html>
<head>
<script src="http://ajax.googleapis.com/ajax/libs/jquery/1.5.1/jquery.min.js" type="text/javascript"></script>
<script type="text/javascript">
function insertcode() {
var $body = $("body");
$body.append('<div style=\" height:1000px; font-size:24px;\">新增项目</div>')
$("#page_tag_load").hide();
}
$(document).ready(function () {
$(window).scroll(function () {
var $body = $("body");
var $html = "";
$html += "<br/>" + ($(window).height() + $(window).scrollTop());
$html += "<br/>window.height: " + $(window).height();
$html += "<br/>body.height: " + $body.height();
$html += "<br/>window.scrollTop: " + $(window).scrollTop();
$("#page_tag_bottom").html($html);
$("#page_tag_bottom").css({"top":$(window).scrollTop()})
/*判断窗体高度与竖向滚动位移大小相加 是否 超过内容页高度*/
// if (($(window).height() + $(window).scrollTop()) >= $body.height()) {
//$("#page_tag_load").show();
//setTimeout(insertcode, 1000);/*IE 不支持*/
// insertcode();
// }
});
});
</script>
</head>
<body>
<div style=" height:1000px; font-size:24px;">新增项目</div>
<div id="page_tag_bottom" style=" 200px; position:fixed;top:0; background-color:#cccccc;height:100px;"></div>
<div id="page_tag_load" style=" display:none; font-size:14px;position:fixed; bottom:0px; background-color:#cccccc;height:50px;">加载中...</div>
</body>
</html>根据滚动条的滚动控制层的浮动
*html {overflow-y: hidden;}/*只是定制垂直滚动fixed*/