复制代码 代码如下:

<title>模仿easyui dialog的效果</title>
<script>
//取得页面元素
var getElement = function() {
return document.getElementById(arguments[0]) || false;
}
function openDialog(dialogId) {
var maskId = \"mask\";
//如果有，先删除原来的
if (getElement(dialogId)) {
document.removeChild(getElement(dialogId));//删除操作：弹出的div
}
if (getElement(maskId)) {
document.removeChild(getElement(maskId));//删除操作：弹出的不可操作(面具)层
}

//背景置灰
var maskDiv = document.createElement(\"div\");
maskDiv.id = maskId;
maskDiv.style.position = \"absolute\";
maskDiv.style.zIndex = \"1\";
maskDiv.style.width = document.body.scrollWidth + \"px\";
maskDiv.style.height = document.body.scrollHeight + \"px\";
maskDiv.style.top = \"0px\";
maskDiv.style.left = \"0px\";
maskDiv.style.background = \"gray\";
maskDiv.style.filter = \"alpha(opacity=10)\";
maskDiv.style.opacity = \"0.30\";//透明度
document.body.appendChild(maskDiv);//向body之中增加背景层

//Dialog
var dialogDiv = document.createElement(\"div\");
dialogDiv.id = dialogId;
dialogDiv.style.position = \"absolute\";
dialogDiv.style.zIndex = \"9999\";
dialogDiv.style.width = \"400px\";
dialogDiv.style.height = \"200px\";
dialogDiv.style.top = (parseInt(document.body.scrollHeight) - 200) / 2 + \"px\"; // 屏幕居中
dialogDiv.style.left = (parseInt(document.body.scrollWidth) - 400) / 2 + \"px\"; // 屏幕居中
dialogDiv.style.background = \"white\";
dialogDiv.style.border = \"1px solid gray\";
dialogDiv.style.padding = \"5px\";
dialogDiv.innerHTML = \"(Dialog Content)\";
//Dialog之中的关闭操作：关闭背景层和Dialog层
var closeControlloer = document.createElement(\"a\");//创建一个超链接(做为关闭的触发)
closeControlloer.href = \"#\";
closeControlloer.innerHTML = \"关闭\";
closeControlloer.onclick = function() {
document.body.removeChild(getElement(dialogId));//删除diaglog
document.body.removeChild(getElement(maskId));//删除背景层
}
dialogDiv.appendChild(closeControlloer);//dialog之中增加\"关闭\"操作
document.body.appendChild(dialogDiv);//body之中增加dialog
}
</script>
<a href=\"#\" onclick=\"openDialog(\'dialog\');\">Open Dialog</a>