function checkOpenWindow (openWin) {
    var exists = false;
    if (openWin && !openWin.closed) {
        exists = true;
        try {
            openWin.focus();
        }
        catch (e) {
            //keepFocus = false;
            exists = false;
        }
        //if (!keepfocus) {  window.focus(); }
    }
    if (!exists)   {
    	//Fire alert and print message on screen
        alert("Pop up blocker was detected, please disable this to continue.");
       document.getElementById('popup_msg').innerHTML = '<div class="red margin-bottom15">Please disable your popup blocker to continue!</div>';
   }
}

function avatar_uploader(user_id) {
	var nw = window.open('http://www.royalascotgolfclub.co.uk/avatar_uploader/upload.php?user_id=' + user_id, 'win1', 'toolbar=0,scrollbars=1,location=0,statusbar=0,menubar=0,resizable=1,width=800,height=750,left=200,top =0');
	checkOpenWindow (nw);
}