Js

function showbatchbuy(pid){
    $("#p"+pid).show();
    clearTimeout(batchbuy);
}

function hidebatchbuy(pid){
    batchbuy = setTimeout(function(){
        $("#p"+pid).hide();
    },500);
}

触发的

onmouseover="showbatchbuy({$item.id});" onmouseout="hidebatchbuy({$item.id});"

层上面的

onmousemove="showbatchbuy({$item.id});" onmouseout="hidebatchbuy({$item.id});"