div屏幕居中
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>DIV屏幕居中</title>
</head>
<body>
<script language="javascript">
var tips = function(options){
//对象唯一标识
this.id = 'tips_' + new Date().getTime();
//对象宽高
this.padding = options.padding || 0;
this.msg = options.msg || '';
//对象
this.obj = document.createElement('div');
//设置属性
this.obj.id = this.id;
this.obj.style.position = 'absolute';
this.obj.style.margin = '0';
this.obj.style.backgroundColor = '#FFF';
this.obj.style.padding = this.padding + 'px';
this.obj.innerHTML = this.msg;
//加入到body
document.body.appendChild(this.obj);
//实际高度
this.width = document.getElementById(this.id).offsetWidth;
this.height = document.getElementById(this.id).offsetHeight;
//设置top left
var body = (document.compatMode && document.compatMode!="BackCompat")? document.documentElement : document.body;
var left = body.scrollLeft + (body.clientWidth - this.width)/2;
var top = body.scrollTop + (body.clientHeight - this.height)/2;
//更改位置
this.obj.style.left = left + 'px';
this.obj.style.top = top + 'px';
this.html = function(html){
document.getElementById(this.id).innerHTML = html;
};
//关闭
this.close = function(){
document.getElementById(this.id).style.display = 'none';
};
};
//调用：
new tips({msg:'<div style="border:#CCC solid 5px;padding:10px 20px; font-size:12px; text-align:center;"><div>正在更新报表，请稍后……</div><div>这一般需要 10 秒钟</div></div>'});
</script>
</body>
</html>