1.h5的部分标签浏览器兼容性问题
解决方案：
<head>
<!--[if lt IE 9]>
<script src="http://cdn.static.runoob.com/libs/html5shiv/3.7/html5shiv.min.js"></script>
<![endif]-->
</head>
html5shiv.main.js中的具体代码如下：
(function(k,m){
var g="3.7.0";
var d=k.html5||{};
var h=/^<|^(?:button|map|select|textarea|object|iframe|option|optgroup)$/i;
var c=/^(?:a|b|code|div|fieldset|h1|h2|h3|h4|h5|h6|i|label|li|ol|p|q|span|strong|style|table|tbody|td|th|tr|ul)$/i;
var q;
var i="_html5shiv";
var a=0;
var o={};
var e;
(function(){
try{
var t=m.createElement("a");
t.innerHTML="<xyz></xyz>";
q=("hidden" in t);
e=t.childNodes.length==1||(function(){
(m.createElement)("a");
var v=m.createDocumentFragment();
return(typeof v.cloneNode=="undefined"||typeof v.createDocumentFragment=="undefined"||typeof v.createElement=="undefined")
}())
}catch(u){
q=true;
e=true
}
}());
function f(t,v){
var w=t.createElement("p"),u=t.getElementsByTagName("head")[0]||t.documentElement;
w.innerHTML="x<style>"+v+"</style>";
return u.insertBefore(w.lastChild,u.firstChild)
}
function l(){
var t=j.elements;
return typeof t=="string"?t.split(" "):t
}
function p(t){
var u=o[t[i]];
if(!u){u={};
a++;
t[i]=a;
o[a]=u
}
return u
}
function n(w,t,v){
if(!t){
t=m
}
if(e){
return t.createElement(w)
}
if(!v){
v=p(t)
}
var u;
if(v.cache[w]){
u=v.cache[w].cloneNode()
}else{
if(c.test(w)){
u=(v.cache[w]=v.createElem(w)).cloneNode()
}else{
u=v.createElem(w)
}
}
return u.canHaveChildren&&!h.test(w)?v.frag.appendChild(u):u
}
function r(v,x){
if(!v){
v=m
}
if(e){
return v.createDocumentFragment()
}
x=x||p(v);
var y=x.frag.cloneNode(),w=0,u=l(),t=u.length;
for(;w<t;w++){
y.createElement(u[w])
}
return y
}
function s(t,u){
if(!u.cache){
u.cache={};
u.createElem=t.createElement;
u.createFrag=t.createDocumentFragment;
u.frag=u.createFrag()
}
t.createElement=function(v){
if(!j.shivMethods){
return u.createElem(v)
}
return n(v,t,u)
};
t.createDocumentFragment=Function("h,f","return function(){
var n=f.cloneNode(),c=n.createElement;
h.shivMethods&&("+l().join().replace(/[\w\-]+/g,function(v){
u.createElem(v);
u.frag.createElement(v);
return‘c("‘+v+‘")‘
})+");
return n
}")(j,u.frag)
}
function b(t){
if(!t){
t=m
}
var u=p(t);
if(j.shivCSS&&!q&&!u.hasCSS){
u.hasCSS=!!f(t,"article,aside,dialog,figcaption,figure,footer,header,hgroup,main,nav,section{
display:block
}
mark{
background:#FF0;color:#000
}
template{
display:none
}")
}
if(!e){
s(t,u)
}
return t
}
var j={
elements:d.elements||"abbr article aside audio bdi canvas data datalist details dialog figcaption figure footer header hgroup main mark meter nav output progress section summary template time video",version:g,shivCSS:(d.shivCSS!==false),supportsUnknownElements:e,shivMethods:(d.shivMethods!==false),type:"default",shivDocument:b,createElement:n,createDocumentFragment:r
};
k.html5=j;
b(m)
}(this,document)
);
2.h5中新的标签
新的语意和结构标签：