gistfile1.html

<script type="text/javascript">function count_tiles() {
    var str = prompt("Please enter your mapdata:");
    if(str == null || str == "") { return; }
    var msg = "";
	var tiles = {"1": '3|4|5|2', "2": 'G|H|I|F', "3": '\\?|@|A|>', "4": '7|8|9|6', "E": '1', "5": 'Q|N|O|P', "6": 'J|K|L|M', "7": 'C|D|E|B', "8": ';|<|=|:', "D": "0"}
	var counts = {}
	var total = 0
	for (var key in tiles) {
	    var count = str.split(new RegExp(tiles[key], "g")).length - 1
		msg += ("There are " + count + " '" + key + "' tiles.\n")
		if(key == "D") { console.log("There are " + (713 - count) + " total filled tiles.") }
	}
	alert(msg)
}</script>

<button onclick="count_tiles()">Mapdata</button>