Jquery小知识

$(document).ready(function(){
$('form').find("input[type=textarea],input[type=password],textarea").each(function(ev)
{
if(!$(this).val()){
$(this).attr("placeholder","Typeyouranswerhere");
}
});
});
//获取属性
HowcanIselectanelementbynamewithjQuery?

$('td[name=tcol1]')//matchesexactly'tcol1'

$('td[name^=tcol]')//matchesthosethatbeginwith'tcol'

HowcanIknowwhichradiobuttonisselectedviajQuery?

[code]$('input[name=radioName]:checked','#myForm').val()//注意这条棒哒哒的选择

使用trigger()方法模拟事件

$("#btn").trigger("click");
//模拟点击http://blog.csdn.net/lijunling2008live/article/details/7457396

<divid="foo">

.slideUp()

.fadeIn()

$('#foo').slideUp(300).delay(800).fadeIn(400);

setTimeout(
function()
{
//dosomethingspecial
},5000);

//实打实的延迟5秒

绑定