<!doctype html>
<html>
<head>
<meta charset="utf-8">
<title>浮动与display:block化</title>
<style>
.ovh { overflow: hidden; }
.red { color: #cd0000; }
[hidden] { display: none; }
</style>
</head>
<body>
<p id="first">这是一个没有设置<code>float</code>属性的按钮：</p>
<p class="ovh"><input type="button" id="btnShow" value="点击我显示display属性值"></p>
<p hidden="">此时，按钮的display属性值是：<span id="result" class="red"></span></p>
<p>点击下面的按钮让上面的按钮添加<code>float: left</code>的声明：</p>
<p><input type="button" id="btnAdd" value="上面的按钮添加float:left"></p>
<script>
var btnShow = document.getElementById("btnShow"),
btnAdd = document.getElementById("btnAdd"),
result = document.getElementById("result"),
first = document.getElementById("first");
if (btnShow && btnAdd && result) {
btnShow.onclick = function() {
// 获得该按钮的display值
var display = this.currentStyle? this.currentStyle.display: window.getComputedStyle(this, null).display;
// 显示结果
result.innerHTML = display;
result.parentNode.removeAttribute("hidden");
// repain fix IE7/IE8 bug
document.body.className = "any";
};
// 设置浮动按钮的点击事件
btnAdd.onclick = function() {
btnShow.style["cssFloat" in this.style? "cssFloat": "styleFloat"] = "left";
// 文字描述的变化
this.value = "上面的按钮已经设置了float:left";
btnShow.value = "再次点击我确认display属性值";
first.innerHTML = first.innerHTML.replace("没有", '<del>没有</del>');
// 结果隐藏
result.parentNode.setAttribute("hidden", "");
// 按钮禁用
this.setAttribute("disabled", "");
};
}
</script>
</body>
</html>
