二维数组、字符串互相转换

以下是随便写的例子。

1.字符串转二维数组

var a="[['1','2','3','4','5'],['a','b','c','d','e'],['y1','y2','y3','y4','y5']] ";

var str=eval(a);

alert(str[0][3]);

//结果：4

2.二维数组转字符串

var b=[['1','2'],['a','b']];

function getString( objarr ){
var typeNO = objarr.length;
  var tree = "[";
  for (var i = 0 ;i < typeNO ; i++){
   tree += "[";
   tree +="'"+ objarr[i][0]+"',";
   tree +="'"+ objarr[i][1]+"'";
   tree += "]";
   if(i<typeNO-1){
       tree+=",";
    }
  }
  tree+="]";
  return tree;
}

alert(getString(b));

//结果："[['1','2'],['a','b']] "