全面解析Javascript无限添加QQ好友原理

var <span style="width: 0px; height: 0px; display: none;" id="transmark"></span>already_send = Array();
var actions = document.getElementsByTagName('iframe')[0].contentWindow.document.getElementsByClassName('action');
function set_interval()
{
setTimeout(function(){
for(var i =0;i<actions.length;i++){
var actived = true;
if(actived)
{
for(var a=0;a<already_send.length;a++)
{
if(already_send[a]==i)
{
actived = false;
break;
}
}
}
if(actived)
{
already_send.push(i);
try{
var is_send = $(document.getElementsByTagName('iframe')[0].contentWindow.document).getElementsByClassName('action')[i].getElementsByTagName('i').length == 0;
console.log(i);
if(!is_send){
$(document.getElementsByTagName('iframe')[0].contentWindow.document).getElementsByClassName('action')[i].getElementsByTagName('a')[0].click();
setTimeout(function(){
var qz-dark-button = document.getElementsByClassName('qz-dark-button');
for(var j =0;j<qz-dark-button.length;j++){
document.getElementsByClassName('qz-dark-button')[j].click();
}
set_interval();},5000); 
break;
}
}
catch(e)
{
var closetag = document.getElementsByClassName('close');
for(var i =0;i<closetag.length;i++){
document.getElementsByClassName('close')[i].click();
}
}
} 
}
},3500);
}
set_interval();