<!DOCTYPE html>
<html>
<head lang="en">
<meta charset="UTF-8">
<title></title>
<style>
.red {
border: solid 1px red;
width: 200px;
height: 100px;
text-align: center;
line-height: 100px;
margin: auto;
}
.blue {
border: solid 1px blue;
width: 200px;
height: 100px;
text-align: center;
line-height: 100px;
margin: auto;
}
</style>
<script type="text/javascript" src="../../js/system.js"></script>
</head>
<body>
<div id="a" class="red">
hello js,,
</div>
<div id="b">
html js2 ,,
</div>
<input type="button" value="点我变红" id="bitRed">
<script type="text/javascript">
36 //id名为b的元素的样式随着id名为a的元素的样式的变化而变化
var clasName = comm.getAttr($$("a"), "class"); //获取id名为a的元素的class样式，并把它赋给clasName;
comm.setAttr($$("b"), "class", clasName); //给id为b的元素设置class样式为clasName;
$$("bitRed").onclick = function () {
// $$("a").setAttribute("class","blue");
comm.setAttr($$("a"), "class", "blue");
var clasName = comm.getAttr($$("a"), "class");
comm.setAttr($$("b"), "class", clasName);
}
</script>
</body>
</html>
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//js样式
/**
* Created by Ibokan on 2015/8/26.
*/
function $$(id) {
return document.getElementById(id);
}
var comm = {
setAttr: function (e, strName, strValue) { //e是元素名称 ，，strName是属性名称，，strValue是属性值。。
e.setAttribute(strName, strValue);
},
getAttr: function (e, strName) {
return e.getAttribute(strName);
}
}