JS1k: The JavaScript code golfing competition

G=[];B="X";U=".";l=225;function $(b){return document.getElementById(b)}function m(b){return b?b.innerHTML:0}function n(b,d){if(b)b.innerHTML=d}function J(b,d){b.style.backgroundColor=d}function q(b,d){e=$(b+"#"+d);if(G[b][d]==B){J(e,"#f00");alert(B);for(b=0;b<15;b++)for(d=0;d<15;d++)n($(b+"#"+d),G[b][d])}else if(m(e)==U){J(e,"#5f5");n(e,G[b][d]);l--;a(b,d,0);l<=0&&alert("Won")}} function a(b,d,f){e=$(b+"#"+d);if(m(e)=="0"){o="";for(v=b-1;v<b+2;v++)for(w=d-1;w<d+2;w++){k=$(v+"#"+w);if(m(k)==U){J(k,"#5f5");n(k,G[v][w]);k&&l--;if(G[v][w]==0)o+=o.length>0?";"+v+";"+w:v+";"+w}}b=0;for(d=o.split(";");d.length>1&&b<d.length;b+=2)a(parseInt(d[b]),parseInt(d[b+1]),f+1)}}for(var r=0;r<15;r++){G[r]=[];for(var c=0;c<15;c++)G[r][c]=0}C=""; for(r=0;r<15;r++){for(c=0;c<15;c++){C+="<span id='"+r+"#"+c+"' onclick='q("+r+","+c+")' style='border:1px solid #aaa;'>.</span>";if(Math.random()<0.075){G[r][c]=B;l--;for(v=r-1;v<r+2;v++)for(w=c-1;w<c+2;w++)if(G[v]&&G[v][w]!=B)G[v][w]+=1}}C+="<br/>"}n(document.body,"<pre>"+C+"</pre>");

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G=[]; // gameboard (holds state of cells)
		B="X"; // represents bomb
		U="."; // represents closed cell (status: undefined)
		l=(15*15); // number of cells (l)eft (rows*cols)
		//shortcut function to get element by id
		function $(p) {
			return document.getElementById(p);
		}
		//shortcut function to get innerHTML of given element p
		function m(p) {
			return p ? p.innerHTML : 0;
		}
		//shortcut function to set innerHTML of given element p
		function n(p,v) {
			if (p) p.innerHTML = v;
		}
		//shortcut function to set backgroundColor of given element p
		function J(p,v){p.style.backgroundColor=v;}

		// invoked when user clicks on a cell
		function q(r, c) {
			e = $(r+"#"+c);
			if (G[r][c]==B) {
				J(e,"#f00");
				alert(B);
				for (r=0; r<15; r++) {
					for (c=0; c<15; c++) {
						n($(r+"#"+c),G[r][c]);
					}
				} 
			} else {
				if (m(e) == U) {
					J(e,"#5f5");
					n(e,G[r][c]);
					l--;a(r,c,0);if (l<=0) {alert("Won");}
				}
			}
		}
		//reveal ("click") all cells around the given cell (r=row, c=col) with value = 0 (recursively).
		function a(r, c, d) {
			e = $(r+"#"+c);
			if (m(e) == "0") { //cell has been clicked and bomb counter is 0
				o = ""; // collect coordinates of other cells with bomb counter 0 to recursively invoke this method again
				for (v=r-1; v<r+2; v++) {
					for (w=c-1; w<c+2; w++) {
						k = $(v+"#"+w);
						if (m(k)==U) {
							J(k,"#5f5");
							n(k,G[v][w]);
							if (k) l--;
							if (G[v][w]==0) {
								o += o.length>0?";"+v+";"+w:v+";"+w;
							}
						}
					}
				}
				for (var i=0,p=o.split(";");p.length>1 && i<p.length;i+=2){
					a(parseInt(p[i]),parseInt(p[i+1]),d+1);
				}
			}
		}
		// initialize memory representation of game board
		for (var r=0;r<15;r++){G[r]=[];for (var c=0;c<15;c++)G[r][c]=0;}
		// draw html representation of game board
		C="";
		for (var r=0; r<15; r++) {
			for (var c=0; c<15; c++) {
				C += "<span id='"+r+"#"+c+"' onclick='q("+r+","+c+")' style='border:1px solid #aaa;'>.</span>";
				// place bombs (math.random<0,075 will result in approx. 10-15 bombs
				if (Math.random()<0.075) {
					G[r][c] = B;
					l--;
					// increment bomb counter in surrounding cells
					for (v=r-1; v<r+2; v++) {
						for (w=c-1; w<c+2; w++) {
							if(G[v]&&G[v][w]!=B) G[v][w]=G[v][w]+1;
						}
					}
				}
			}
			C+="<br/>";
		}
		n(document.body,"<pre>"+C+"</pre>");