BubbleSort in Javascript

var arr = [4,8,2,4,10,2,4];

for(var i = 0; i < arr.length; i++) {
	
	for(var z = 0; z < arr.length-i; z++) {
		if(arr[z] > arr[z+1]) {
			//swap
			var temp = arr[z];
			arr[z] = arr[z+1]
			arr[z+1] = temp;
		}		
	}