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With the simulation of popup windows layered in the page, the need to play with the z-index CSS property and being able to dynamically center an element, commonly a div, becomes a necessity for everyone's javascript library. In this article, we will look at a simple function which will take the user's browser dimensions and center a given element's id.
Finding an element's position in javascript is a simple process but requires some understanding of the DOM structure and recursive programming. Unless it is the root, an element always has a parent. We know that we can always find an object's relative position to its parent and therefore, we just have to climb up the tree of elements.
