jquery之隐藏div

1、$("#demo").attr("style","display:none;");//隐藏div
$("#demo").attr("style","display:block;");//显示div
2、$("#demo").css("display","none");//隐藏div
$("#demo").css("display","block");//显示div
3、$("#demo").hide();//隐藏div
$("#demo").show();//显示div
4、$("#demo").toggle(
function () {
$(this).attr("style","display:none;");//隐藏div
},
function () {
$(this).attr("style","display:block;");//显示div
}
);
<div id="demo"></div>