How to move a button using Javascript on MouseOver

[SEhtesham]

hi,
I want to move a button to new location at the mouseOver event in JavaScript..
Please have a look at my code below.

function move() {
   b1.style.position = "relative";
   setTimeout(b1.style.left = 100,1000)
   }

<input type="button" name="b1" value="click" onmouseover="move()"/>

Im able to move the button to the new location but its moving very fast,I want to move the button slowly.Much like when we use .hide("slow")
I have tried using setTimeout(b1.s tyle.left = 100,1000) but its not working..
Please guide how to do it

[Dormilich]

1) style.left expects a value with unit, e.g. 100px or 2em
2) for a movement, you need an animation. what you currently have is a single step.