js 遮罩层
//调用方法
//关闭事件<button onclick=\’LayerHide()\’>关闭</button>，在loadDiv(text)中，剔除出来
//调用LayerShow(text)，text为参数，可以写入想要写入的提示语
//本方法在调用时会自动生成一个添加到body的div，并且会在调用隐藏遮罩层 LayerHide()时删除div
//封装遮罩层div显示效果
//将其放在页面的div中加载
function loadDiv(text) {
var div = “<div id=\’_layer_\’> <div id=\’_MaskLayer_\’ style=\’filter: alpha(opacity=30); -moz-opacity: 0.3; opacity: 0.3;background-color: #000; width: 100%; height: 100%; z-index: 1000; position: absolute;” +
“left: 0; top: 0; overflow: hidden; display: none\’></div><div id=\’_wait_\’ style=\’z-index: 1005; position: absolute; width:430px;height:218px; display: none\’ ><center><h3>” +
“” + text + “<img src=\’../images/loading.gif\’ /></h3><button onclick=\’LayerHide()\’>关闭</button></center></div></div>”;
return div;
}
//触发遮罩层
function LayerShow(text) {
var addDiv= loadDiv(text);
var element = $(“#” + addDiv).appendTo(document.body);
$(window).resize(Position);
var deHeight = $(document).height();
var deWidth = $(document).width();
Position();
$(“#_MaskLayer_”).show();
$(“#_wait_”).show();
}
//获取相对位置
function Position() {
$(“#_MaskLayer_”).width($(document).width());
var deHeight = $(window).height();
var deWidth = $(window).width();
$(“#_wait_”).css({ left: (deWidth – $(“#_wait_”).width()) / 2 + “px”, top: (deHeight – $(“#_wait_”).height()) / 2 + “px” });
}
//隐藏遮罩层
function LayerHide() {
$(“#_MaskLayer_”).hide();
$(“#_wait_”).hide();
del();
}
//清空div,避免产生重复
function del() {
var delDiv = document.getElementById(“_layer_”);
delDiv.parentNode.removeChild(delDiv); //删除
}