!DOCTYPE html

html

head

meta charset=utf-8 /

title/title

script type=text/javascript src=js/jquery-1.7.2.js /script

/head

body

h5hello world/h5

script

alert(script脚本1)

/script

script

$(function(){

alert(页面加载完成)

})

/script

script

alert(script脚本2)

/script

/body

/html

javascript的执行顺序是自上而下的，所以首先执行alert（“script脚本1”）然后是alert（“script脚本2”），最后是alert(页面加载完成)，$(function(){

})表示是页面加载完成后执行，script属于页面的一部分；

创建元素并追加到body中

script

$(function(){

$(divpHello/p/div).appendTo(body);

})

/script

script颂裹

$(function(){

$(divpHello/p/div).appendTo(h5);

$(divphello/p/div).appendTo(h5)

$(h5).append(123)

})

/script

连续追加

//判断IE

function isIE(){

var userAgent = navigator.userAgent,

rMsie = /(msie|trident.*rv:)(+)/,

rFirefox = /(firefox)\/(+)/,

rOpera = /(opera).+version\/(+)/,

爷获 rChrome = /(chrome)\/(+)/,

rSafari = /version\/(+).*(safari)/;

var browser;

var version;

var ua = userAgent.toLowerCase();

var match = rMsie.exec(ua);

if (match != null) {

霸怕墨 ieVersion = { browser : IE, version : match || 0 };

return true;

}

var match = rFirefox.exec(ua);

if (match != null) {

var ffVersion = { browser : match || , version : match || 0 };

return false;

}

var match = rOpera.exec(ua);

if (match != null) {

var opVersion = { browser : match || , version : match || 0 };

return false;

}

var match = rChrome.exec(ua);

if (match != null) {

var chVersion = { browser : match || , version : match || 0 };

return false;

}

var match = rSafari.exec(ua);

if (match != null) {

var sfVersion = { browser : match || , version : match || 0 };

return false;

}

if (match != null) {

var ohterVersion = { browser : , version : 0 };

return false;

}

}