function classJudegSize0() {
var reallySize = parseInt($(".img_box")[0].naturalWidth);
$(document).ready(function () {
$(window).on("resize", function () {
var img_box = parseInt($(".img_box:eq(0)").width());
var mainWarp = parseInt($(".main_wrap").width());
if (reallySize > mainWarp) {
var img_box = parseInt($(".img_box:eq(0)").width());
var mainWarp = parseInt($(".main_wrap").width());
$(".img_box:eq(0)").css("width", mainWarp);
$(".img_box:eq(0)").mouseover(function () {
$(".img_bg:eq(0)").show();
});
$(".img_bg:eq(0)").mouseout(function () {
$(this).hide();
})
}
if (reallySize <= mainWarp) {
$(".img_box:eq(0)").css("width", reallySize);
$(".img_box:eq(0)").mouseover(function () {
$(".img_bg:eq(0)").hide();
});
$(".img_bg:eq(0)").mouseout(function () {
$(this).hide();
})
}
});
});
}