本文實例講述了JavaScript實現獲取dom中class的方法。分享給大家供大家參考。具體實現方法如下：
<!DOCTYPE html>
<html>
<head lang="en">
<meta charset="UTF-8">
<title></title>
<script>
function getClass(node,classname) {
if(node.getElementsByClassName) {
return node.getElementsByClassName(classname);
//如果存在該標簽 就返回
} else {
var elems = node.getElementsByTagName(node),
defualt = [];
for (var i = 0; i < elems.length; i++) {
//遍歷所有標簽
if(elems[i].className.indexOf(classname) != -1) {
//查找相應類名的標簽
defualt[defualt.length] = elems[i];
}
}
return defualt;
}
}
window.onload = function () {
var text = document.getElementById('text'),
cs = getClass(text,'cs');
document.write(cs.innerHTML='cs');
}
</script>
</head>
<body>
<div id="text"><div class="cs">textcss</div></div>
</body>
</html>
希望本文所述對大家的javascript程序設計有所幫助。