界面滑动出现按钮

$(window).bind("scroll", function () {
var sTop = $(window).scrollTop();
var sTop = parseInt(sTop);
console.log(sTop);
if (sTop >= 130) {
if (!$("#scrollSearchDiv").is(":visible")) {
try {
$("#scrollSearchDiv").slideDown();
} catch (e) {
$("#scrollSearchDiv").show();
}
}
}
else {
if ($("#scrollSearchDiv").is(":visible")) {
try {
$("#scrollSearchDiv").slideUp();
} catch (e) {
$("#scrollSearchDiv").hide();
}
}
}
});