/* spec information about this property
name= top
css1= NA
css2= http://www.w3.org/TR/2008/REC-CSS2-20080411/visuren.html#propdef-top
css21= http://www.w3.org/TR/2011/REC-CSS2-20110607/visuren.html#propdef-top
css3= http://www.w3.org/TR/2012/WD-css3-positioning-20120207/#top
other= 
*/