var d = new Date()
var h = d.getHours()

//
if (h < 6) document.write('<style type="text/css">body{background:url(graphics/bg-top-night.jpg) center top no-repeat #0B5989;} .main-container {background:url(graphics/bg-bottom-night.jpg) bottom center no-repeat; min-height:800px;} #balloon{display:none;}</style>')

else if (h < 12) document.write('<style type="text/css">body{background:url(graphics/bg-top-american.gif) center top no-repeat #9CC6DF;} .main-container {background:url(graphics/bg-bottom.jpg) bottom center no-repeat; min-height:800px;} #balloon{display:block;}</style>')
else if (h < 18) document.write('<style type="text/css">body{background:url(graphics/bg-top-american.gif) center top no-repeat #9CC6DF;} .main-container {background:url(graphics/bg-bottom.jpg) bottom center no-repeat; min-height:800px;} #balloon{display:block;}</style>')
else if (h < 24) document.write('<style type="text/css">body{background:url(graphics/bg-top-night.jpg) center top no-repeat #0B5989;} .main-container {background:url(graphics/bg-bottom-night.jpg) bottom center no-repeat; min-height:800px;} #balloon{display:none;}</style>')