First commit. Check if all is uploaded well.

counter.js

@@ -0,0 +1,46 @@
+var script = document.currentScript; //For know path
+
+//Returns path of file, without /
+function cutUrlFile(cad){
+    chars = cadena.split("");
+    blocks = cadena.split("/");
+    blockNum=1;
+
+    if(chars[chars.length-1]==="/"){
+        blockNum++;
+    }
+
+    pseudoReturn = [];
+
+    for(i=0;i<blocks.length-blockNum;i++){
+        pseudoReturn.push(blocks[i]);
+    }
+
+    return pseudoReturn.join("/");
+}
+
+var path = cutUrlFile(script.src); //Path, for calling php in Ajax
+
+function loadcounter() { //Todo el js
+	var cookiename = "CheckWeb" + SiteID;
+	var b = document.cookie.match('(^|;)\\s*' + cookiename + '\\s*=\\s*([^;]+)');
+	var iscookie = b ? b.pop() : '';
+	if (iscookie != ""){
+		var visited = 1; //Visitado
+	}else{ //Si no esta visitado, hacer la cookie y contar visita unica
+		var visited = 0;
+		var d = new Date();
+		d.setTime(d.getTime() + (24*3600*1000));
+		var expires = "expires="+ d.toUTCString();
+		document.cookie = "CheckWeb" + SiteID + "=visited" + "; " + expires;
+	}
+	// Enviamos los datos para introducir en la DB
+	// Obtener la instancia del objeto XMLHttpRequest
+	conexion = new XMLHttpRequest();
+	// Realizar peticion HTTP
+	conexion.open('POST', path+'/counterajax.php');
+	conexion.setRequestHeader("Content-Type", "application/x-www-form-urlencoded");
+	conexion.send("SiteID="+SiteID+"&visited="+visited);
+}
+
+loadcounter(); //Para que funcione