Recently used commands

"; for (var i=0; i"; } } else alert("Command " + cmd[0] + " does not exist"); recent[recent.length]=cmd1; if (recent.length==100) recent=recent.slice(50, recent.length); if (x<-20 || y<-20 || x>=420 || y>=420){ con = false; rover.style.display="none"; alert("Connection with the rover has been lost..."); } rover.style.left = x - 30; rover.style.top = y - 40; therover.setAttribute("transform", "rotate(" + angle + ")"); info.innerHTML = "Position: " + Math.round(x) + ", " + Math.round(y) + "
Orientation: " + angle + "°
Rocks: " + R; } function rock(a4, a5){ var x=Math.round(a4); var y=Math.round(a5); this.viz = (Math.random()<0.5 && x!=y && x+y!=400 && isint(a4) && isint(a5) && foo(x) && foo(y) && foo(400-x) && foo(400-y)); this.oxygen = Math.random()*10; this.silicon = Math.random()*6; this.sulfur = Math.random()*15; this.iron = Math.random()*20; this.nitrogen = Math.random()*6; this.sum = this.oxygen + this.silicon + this.sulfur + this.iron + this.nitrogen; this.sum/=100.0; this.analyze = function(){ var msg = "The rock consists of:\n" + (this.oxygen/this.sum).toFixed(2) + "% oxygen\n" + (this.silicon/this.sum).toFixed(2) + "% silicon\n" + (this.sulfur/this.sum).toFixed(2) + "% sulfur\n" + (this.iron/this.sum).toFixed(2) + "% iron\n" + (this.nitrogen/this.sum).toFixed(2) + "% nitrogen\n"; if (this.viz) for(var i=1; i<=chch.length; i++) msg+=String.fromCharCode(chch[i-1]+1); alert(msg); }; } function foo(x){ if (x<=1) return false; for (var d=1; d=y) x = bar(x, y); return x; } function bar(x, y){ return y==0 ? x : bar(x-1, y-1); }

Mars Rover [Can you find life on Mars?]