function resized()
{
    var _h = $(window).height()-70;
    $('#wrapper').css('min-height', _h+'px');
    if($('#prehome')){
        $('#prehome').css('margin-top', (_h/2-342/2)+'px');
    }
}

$(document).ready(function() {
    resized();
    $(window).bind("resize", function() {
        resized();
    });
});