Randomly positioning an element via css with jquery -

is there reason

$("#cloud").top(100).left(100);

doesn't work despite fact

$("#cloud").height(math.random()*55).width(math.random()*55);

and

#cloud {     top:100px;     left:100px; }

work fine?

top , left css properties, , should therefore assigned .css() function.

$("#cloud").css({     "top" : "100px",     "left" : "100px" });

KHS