mobile 像素布局 纵向全屏

http://stackoverflow.com/questions/15438295/how-to-zoom-in-out-depending-on-browser-height-using-css-zoom-property

function zoomSquare() {
    var $square = $('.square');

    var viewportHeight = $(window).height();
    var squareHeight = $square.height();
    var desiredHeight = Math.round(viewportHeight * 0.95);
    var zoom = (desiredHeight / squareHeight);

    $square.css('zoom', zoom);
    $square.css('-moz-transform', 'scale(' + zoom + ')');
    $square.css(  '-o-transform', 'scale(' + zoom + ')');
}

// When the browser is resized
$(window).on('resize', function(){ zoomSquare(); });

// When the page first loads
$(document).ready(function(){
    zoomSquare();
});