Example function for centering an element is shown below.
jQuery.fn.center = function () { this.css("position","absolute"); this.css("top", (($(window).height() - this.outerHeight()) / 2) + $(window).scrollTop() + "px"); this.css("left", (($(window).width() - this.outerWidth()) / 2) + $(window).scrollLeft() + "px"); return this; } //We can call the method as follows: $("#popup").center();
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