$(function () {
 $('#w_grid-1548214983685 .p_gridbox').css("height", "50px");
   $('#w_grid-1548161796418 .p_gridbox').css("height", "50px");
   $('#w_grid-1548162605954 .p_gridbox').css("height", "50px");
   $('#w_grid-1548162878501 .p_gridbox').css("height", "50px");
   $('#w_grid-1548163094537 .p_gridbox').css("height", "50px");
   $('#w_grid-1548203961613 .p_gridbox').css("height", "50px");
   $('#w_grid-1548204133559 .p_gridbox').css("height", "50px");
   $('#w_grid-1548204564245 .p_gridbox').css("height", "50px");
});


function scrollevent() {
        window.onscroll = function(e){
            scrollfunc();
            if(scrolldirection == 'down'){
                //页面向下滚动要做的事情
               console.log('页面向下滚动');
               $('.p_navbox').parents('.p_gridbox').css({
               		height:0
               })
            }
            else if(scrolldirection == 'up'){
                //页面向上滚动要做的事情
               console.log('页面向上滚动');
               $('.p_navbox').parents('.p_gridbox').css({
               	height:'50px'
               })
            }
        }
    }
    scrollevent();
    var scrollaction = {
            x: 'undefined',
            y: 'undefined'
        },
        scrolldirection;

    function scrollfunc() {
        if (typeof scrollaction.x == 'undefined') {
            scrollaction.x = window.pagexoffset;
            scrollaction.y = window.pageyoffset;
        }
        var diffx = scrollaction.x - window.pagexoffset;
        var diffy = scrollaction.y - window.pageyoffset;
        if (diffx < 0) {
            // scroll right
            scrolldirection = 'right';
        } else if (diffx > 0) {
            // scroll left
            scrolldirection = 'left';
        } else if (diffy < 0) {
            // scroll down
            scrolldirection = 'down';
        } else if (diffy > 0) {
            // scroll up
            scrolldirection = 'up';
        } else {
            // first scroll event
        }
        scrollaction.x = window.pagexoffset;
        scrollaction.y = window.pageyoffset;
    }