var screenWidth = $(window).width();

if( screenWidth < 500){

????var paddingWidth = 15;

????var scale = (screenWidth - paddingWidth*2) / 500;

????var trans = paddingWidth/scale;

????$('#gridContainer').css({

????????'transform-origin': '0 0',

????????'transform': 'scale('+scale+') translate('+trans+'px, '+trans+'px)',

????????'-webkit-transform': 'scale('+scale+') translate('+trans+'px, '+trans+'px)',

????})

}