js弹出的对话窗口永远保持居中显示_javascript技巧



代码如下:







window.onload = function () {
var alertWindow = $("alertParent");
alertWindow.style.width = window.screen.availWidth + "px";
alertWindow.style.height = window.screen.height + "px";
$("Sure").onclick = function () {
alertWindow.style.visibility = "hidden";
}
}
function ShowAlert() {
var alertWindow = $("alertParent");
alertWindow.style.visibility = "visible";
}
$ = function (id) {
return document.getElementById(id);
}
















添加遮罩层