jQuery
1
Code Link 1 Source Documentation:
$("#id, .class, div").css("background", "blue");
MooTools
1

2
Code Link 1 Link 2 Source Documentation:
$("id").setStyle("background", "blue");

// Grouping
$$("#id", ".class", "div").setStyle("background", "blue");
The Dojo Toolkit
1
Code Link 1 Source Documentation:
dojo.query("#id, .class, div").style("background", "blue");
Prototype / Script.aculo.us
1

2
Code Link 1 Link 2 Source Documentation:
$("id").setStyle({ "background": "blue" });

// Grouping
$$("#id", ".class", "div").invoke("setStyle", { "background": "blue" });
Ext JS
1

2
Code Link 1 Link 2 Source Documentation:
Ext.get("id").setStyle("background", "blue");

// Grouping
Ext.get(Ext.query("#id, .class, div")).setStyle("background", "blue");
Adobe Spry
1
Code Link 1 Source Documentation:
Spry.$$("#id, .class, div").setStyle("background: blue;");
BBC Glow
1
Code Link 1 Source Documentation:
glow.dom.get("#id, .class, div").css("background", "blue");
Yahoo! UI Library
1
Code Link 1 Source Documentation:
Y.all("#id, .class, div").setStyle("background", "blue");

 Matthias Schütz - Media Designer / Web Designer / Developer / Freelancer