Pure JS Implementation according to the CSS class selection dom_javascript skills

On the web for reference, I modified part of the
Code as follows, pure JS, request browser Support Getelementsbyclassname method

Copy Code code as follows:

<script type= "Text/javascript" >
function Getelementsbyclassname (classname,node) {
node = node | | Window.document;
if (node.getelementsbyclassname) {
return Node.getelementsbyclassname (classname);
}else{
var results = new Array ();
var elems = Node.getelementsbytag ("*");
for (Var i=0;i<elems.length;i++) {
if (Elems[i].classname.indexof (className)!=-1) {
Results[elems.length] = elems[i];
}
}
return results;
}
};
</script>