Jquery窗口发生变化回调函数
$(window).resize(function() {
var win_width = $(window).width();
var win_height = $(window).height();
console.log(win_width);
console.log(win_height);
}); 
$(window).resize(function() {
var win_width = $(window).width();
var win_height = $(window).height();
console.log(win_width);
console.log(win_height);
});