// ==UserScript==
// @name         Dota Match screen win percentage
// @namespace	 dsfjahsdlkjg
// @version      0.1
// @description  enter something useful
// @include		 http://www.dotabuff.com/players/*/matches*
// @author       You
// @grant        none
// ==/UserScript==
//
var active = 0
var input=document.createElement("input");
input.type="button";
input.value="Dota stats";
input.onclick = showWinPercentage;
input.setAttribute("style", "font-size:18px;position:absolute;top:120px;right:5px;");
document.body.appendChild(input);

function showWinPercentage()
{
    if (active==0){
	var wins = 0;
	var loses = 0;
	var noStats = 0;
    var winPerc = 0.0;
    var as = document.getElementsByTagName("a");
        for(var i=0;i<as.length;i++)
    {
        var cls =as[i].getAttribute("class");
        if(cls)
        {
            if(cls.indexOf("won") >= 0)
            {
                wins += 1;
            }
            else
            if(cls.indexOf("lost") >= 0)
            {
                loses += 1;
            }
        }

    }

    winPerc=(wins/(wins+loses))*100;
    var div=document.createElement("div");
    div.setAttribute("style",";border:1px solid red;padding:10px 10px 10px 100px;");
    div.innerHTML +="<b>Won: </b>"+wins+"<br>";
    div.innerHTML +="<b>Lost: </b>"+loses+"<br>";
    div.innerHTML +="<b>Win percentage: </b>"+winPerc+"%<br>";
    document.body.insertBefore(div,document.body.firstChild);
    active=1;
    }


}