function init(){
	 CenterItem($("#content"));		 
 
	 function CenterItem(theItem){  
      var winHeight=$(window).height();  
    	var windowMiddle=winHeight/2;  
   		var itemMiddle=$(theItem).height()/2;  
    	var theMiddle=windowMiddle-itemMiddle;
			
			if(winHeight>$(theItem).height()){ //vertical  
         $(theItem).css('margin-top',theMiddle-30);  
    	}
			else{  
        $(theItem).css('margin-top','0');  
      }  
   }
}

$(document).ready(init);