PROTOTYPE1.5.1RC1API文档APIDOCUMENTATIONWelcometotheAPIdocumentationforPrototype.Theleftcolumncontainsthemainsections.Whenyouactivateasection,itsdetailedcontentsthenappearsatthetopofthecolumn.Wearedoingourbesttoprovideyouwithcurrent,clear,exa