In addition to the explanation, what does the $ mean in javascript? Here is the code:

```
var ZebraTable = {
    bgcolor: '',
    classname: '',
    stripe: function(el) {
        if (!$(el)) return;
        var rows = $(el).getElementsByTagName('tr');
    for (var i=1,len=rows.length;i<len;i++) {
        if (i % 2 == 0) rows[i].className = 'alt';
        Event.add(rows[i],'mouseover',function() { 
ZebraTable.mouseover(this); });
    Event.add(rows[i],'mouseout',function() { ZebraTable.mouseout(this); });
    }
},
mouseover: function(row) {
    this.bgcolor = row.style.backgroundColor;
    this.classname = row.className;
    addClassName(row,'over');
},
mouseout: function(row) {
    removeClassName(row,'over');
    addClassName(row,this.classname);
    row.style.backgroundColor = this.bgcolor;
}
}

window.onload = function() {
ZebraTable.stripe('mytable');
}

```

Here is a link to where I got the code and you can view a demo on the page. It does not appear to be using any framework. I was actually going through a JQuery tutorial that took this code and used JQuery on it to do the table striping. Here is the link:

<http://v3.thewatchmakerproject.com/journal/309/stripe-your-tables-the-oo-way>