js实现遮罩层弹出框的方法_javascript技巧

昨天公司网站需要弹窗提示一些信息,要我在把弹窗的js代码和弹窗窗口html写在一起哪里需要就调用

不说那么多了,直接上代码,感觉肯定会有兼容问题,看到了请指出啊：

代码如下:

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内容

//锁定背景屏幕
function lockScreen() {
var clientH = document.body.offsetHeight; //body高度
var clientW = document.body.offsetWidth; //body宽度
var docH = document.body.scrollHeight; //浏览器高度
var docW = document.body.scrollWidth; //浏览器宽度
var bgW = clientW > docW ? clientW : docW; //取有效宽
var bgH = clientH > docH ? clientH : docH; //取有效高
var blackBg = document.createElement("div");
blackBg.id = "blackBg";
blackBg.style.position = "absolute";
blackBg.style.zIndex = "99999";
blackBg.style.top = "0";
blackBg.style.left = "0";
blackBg.style.width = bgW+"px";
blackBg.style.height = bgH+"px";
blackBg.style.opacity = "0.4";
blackBg.style.backgroundColor = "#333";
document.body.appendChild(blackBg);
}
//关闭按钮事件
function popupClose(el) {
var blackBg = document.getElementById("blackBg");
blackBg && document.body.removeChild(blackBg);
el.parentNode.style.display = "none";
}
//自动关闭
function autoClose(id) {
id = id || "H-dialog";
var blackBg = document.getElementById("blackBg");
var objDiv = document.getElementById(id);
setTimeout(function(){
blackBg && document.body.removeChild(blackBg);
objDiv.style.display = "none";
},2000);
}
/**
*功能 : 弹窗信息
*参数1 : 提示信息内容
*参数2 : 提示信息状态默认0 为提示信息,1为成功信息
*参数3 : 弹窗div的id,默认"H-dialog"
*参数4 : 弹窗内容的id,默认"msgCont"
**/
function showMsg(msg) {
msg = msg || "请重新操作";
var status = arguments[1] || 0,
popupId = arguments[2] || "H-dialog",
contentId = arguments[3] || "msgCont";
lockScreen();
//屏幕实际高宽
var pageWidth = window.innerWidth;
var pageHeight = window.innerHeight;
if (typeof pageWidth != "number") {
if (document.compatMode == "CSS1Compat") {
pageWidth = document.documentElement.clientWidth;
pageHeight = document.documentElement.clientHeight;
} else {
pageWidth = document.body.clientWidth;
pageHeight = document.body.clientHeight;
}
}
//滚动条高宽
var scrollLeft = window.document.documentElement.scrollLeft;
var scrollTop = 0;
if (typeof window.pageYOffset != 'undefined') {
scrollTop = window.pageYOffset;
} else if (typeof window.document.compatMode != 'undefined' &&
window.document.compatMode != 'BackCompat') {
scrollTop = window.document.documentElement.scrollTop;
} else if (typeof window.document.body != 'undefined') {
scrollTop = window.document.body.scrollTop;
}

var div_X = (pageWidth - 400) / 2 + scrollLeft;
var div_Y = (pageHeight - 200) / 2 + scrollTop;
var objDiv = document.getElementById(popupId);
if (status) {
document.getElementById(contentId).style.background = "url($Root/Assets/Images/ui_success.png) no-repeat 20px 50%";
}
document.getElementById(contentId).innerHTML = msg;
objDiv.style.display = "block";
objDiv.style.left = div_X + "px";
objDiv.style.top = div_Y + "px";
autoClose(popupId);
}

希望本文所述对大家的javascript程序设计有所帮助。