js遍历获取表格中的数据

var mytable = document.getElementById("id");
		  var data = [];
		  for(var i=0,rows=mytable.rows.length; i<rows; i++){
			  var data2= [];
		    for(var j=0,cells=mytable.rows[i].cells.length; j<cells; j++){
		      data2.push(mytable.rows[i].cells[j].innerHTML) 
		    }
		    data.push(data2);
		  }