function getXhr(){
	var xhr = null; 
	if(window.XMLHttpRequest)
		xhr = new XMLHttpRequest(); 
	else if(window.ActiveXObject){
		try {
			xhr = new ActiveXObject("Msxml2.XMLHTTP");
			} catch (e) {
			xhr = new ActiveXObject("Microsoft.XMLHTTP");
		}
	}
	else {
		xhr = false; 
	} 
    return xhr
}

function download(id_link,id_mix){
	var xhr = getXhr()
	xhr.open("POST","http://www.originaldj.com/download.php",true);
	xhr.setRequestHeader('Content-Type','application/x-www-form-urlencoded');
	xhr.send("id_link="+id_link+"&id_mix="+id_mix);
}