JS获取class属性

//用js获取Class方法

function getByClass (className,context){

context = context || document;

if (context.getElementsByClassName){

return context.getElementsByClassName(className);

}

var nodes = context.getElementsByTagName('*'),

ret = [];

for (var i = 0;i<nodes.length;i++ ){

if (hasClass(nodes[i],className)) ret.push(nodes[i]);

}

return ret;

}

function hasClass(node,className){

var names = node.className.split(/\s+/);

for (var i = 0;i<names.length;i++){

if (names[i] == className)

return true;

}

return false;

}

调用方法

var className = getByClass(muuid);//由于IE下使用name属性存在长度+1的问题所以改用class属性