js数组对象根据多个属性值排序

例如:将下列数组按照pxId排序,当pxId相等时按照dj排序

var arr1 = [
			{ID: "4001104",pxId: 2001,dj: 1,bh: 4001104},
			{ID: "4001105",pxId: 2005,dj: 1,bh: 4001105},
			{ID: "4010102",pxId: 2001,dj: 10,bh: 4010102},
			{ID: "4010103",pxId: 2005,dj: 10,bh: 4010103},
			{ID: "4010104",pxId: 2001,dj: 10,bh: 4010104},
			{ID: "4001102",pxId: 2001,dj: 1,bh: 4001102},
			{ID: "4001103",pxId: 2002,dj: 1,bh: 4001103},
			{ID: "4001106",pxId: 2003,dj: 1,bh: 4001106},
			{ID: "4001101",pxId: 2001,dj: 2,bh: 4001101},
			{ID: "4010101",pxId: 2001,dj: 10,bh: 4010101}
		];
		arr1.sort(function(a, b) {  
			if(a["pxId"] === b["pxId"]) {    
				if(a["dj"] > b["dj"]) {      
					return 1;    
				} else if(a["dj"] < b["dj"]) {      
					return -1;    
				} else {      
					return 0;    
				}  
			} else {    
				if(a["pxId"] > b["pxId"]) {      
					return 1;    
				} else {      
					return -1;    
				}  
			}
		})
		console.log('arr1------', arr1);

打印出的结果