(function($){
  $.fn.vCenter = function(options) {
    var pos = {
      sTop : function() {
        return window.pageYOffset || $.boxModel && document.documentElement.scrollTop ||	document.body.scrollTop;
      },
      wHeight : function() { 
        //if ( $.browser.opera || ($.browser.safari && parseInt($.browser.version) > 520) ) {
    	if ( $.browser.opera ) {
    			return window.innerHeight - (($(document).height() > window.innerHeight) ? getScrollbarWidth() : 0);
    		} else if ( $.browser.safari ) {
    			return window.innerHeight;
    		}	else {
          return $.boxModel && document.documentElement.clientHeight || document.body.clientHeight;
        }
      }
    };
    return this.each(function(index) {
      if (index == 0) {
        var $this = $(this);
        var elHeight = $this.height();
        $this.css({
          position: 'absolute',
          marginTop: '0',
          top: pos.sTop() + (pos.wHeight() / 2) - (elHeight / 2)
        });        
      }
    });
  };

})(jQuery);