jQuery.cssNumber
An object containing all CSS properties that may be used without a unit. The .css() method uses this object to see if it may append px to unitless values.
An object containing all CSS properties that may be used without a unit. The .css() method uses this object to see if it may append px to unitless values.
Return a number representing the current time.
Reduce the set of matched elements to the even ones in the set, numbered from zero.