var arr1 = new Array();

			var arr2 = new Array();

			for(var i = 0; i<20; i++){

				arr1.push(i);

			}

			for(var k = 0; k<10;k++){

				var id = Math.ceil(Math.random()*19);

				if(arr2.indexOf(arr1[id]) === -1){

					arr2.push(arr1[id]);

				}else{

					k= k - 1;

					continue;

				}

			}

			console.log(arr2);