ajax php仿网易文章评论顶一下效果
ajax php教程仿网易文章评论顶一下效果
<div class='plding fr'>
<a href='action.php?id="1&action=top_num'>顶一下</a>[5]
</div>
js ajax
<script language="网页特效" type="text/javascript">
<!--
// ajax检测评论是否已经支持过了
function getcookie(c_name){ //检测cookie
if (document.cookie.length>0){
c_start=document.cookie.indexof(c_name + "=")
if(c_start!=-1){
c_start=c_start + c_name.length+1;
c_end=document.cookie.indexof(";",c_start);
if(c_end==-1) c_end=document.cookie.length;
return unescape(document.cookie.substring(c_start,c_end));
}
}
return "";
}function setcookie(c_name,value,expiredays){ //设置cookie
var exdate=new date();
exdate.setdate(exdate.getdate()+expiredays);
document.cookie=c_name+ "=" +escape(value)+((expiredays==null) ? "" : ";expires="+exdate.togmtstring());
}function createxmlhttprequest(){ //创建xmlhttprequest对象
if(window.activexobject){ //ie
try {
return new activexobject("microsoft.xmlhttp");
} catch(e){
return;
}
}else if(window.xmlhttprequest){ //mozilla,firefox
try {
return new xmlhttprequest();
} catch(e){
return;
}
}
}function get_top_num(id){ //主调函数
var get_top_cookie=getcookie('get_top_'+id+'_cookie');
if(get_top_cookie!=null && get_top_cookie!=""){
alert('此条评论你已经支持过了');
}
else{
var xmlhttp=createxmlhttprequest();
var url = "action.php?action=top_num&id="+id;
if (id==""){
return false ;
}
if (xmlhttp){
callback = getreadystatehandler(xmlhttp,id);
xmlhttp.onreadystatechange = callback;
xmlhttp.open("get", url,true);
xmlhttp.send(null);
}
setcookie('get_top_'+id+'_cookie','istop',1);
}
}function getreadystatehandler(xmlhttp,id){ //服务器返回后处理函数
var top_num = document.getelementbyid("top_num_"+id).innerhtml;
return function (){
if(xmlhttp.readystate == 4){
if(xmlhttp.status == 200){
if (xmlhttp.responsetext==1){
document.getelementbyid("top_num_"+id).innerhtml=number(top_num)+1;
}
}
}
}
}//-->
</script>
补充：Php教程,Php高级应用
