var left = $('#leftheight').height();
var middle = $('#middle').height();
var right = $('#rightheight').height();

function resize(){

    var body = $(window).height();
    var content = $('#data').height() + 505;

    var height = (body > content) ? body : content;

    $('#content').css('height',height -505 + 'px');
    $('#leftheight').css('height',height -250 + 'px');
    $('#rightheight').css('height',height -250 + 'px');
    $('.bottom').show();
    $('#footer').css('visibility', 'visible');
} 

$(document).ready(function(){
    resize();
});

$(window).resize(function() { 
    resize();
});