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" });

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