This new beta of the upcoming script.aculo.us 1.7 release adds support for using the morph effects with style definitions in CSS classes: So, first define a CSS class: .warning { font-size: 15px; color: #f00; border: 4px soild #f00; } Then use it with .morph(): $(‘mydiv’).morph(‘warning’); Thanks to Tobie Langel for this niceness. Additionally, next to … Continue reading script.aculo.us 1.7.0 beta 2