1、javascript把二维数组转为json格式的字符串代码如下：
// 二维数组转为json格式的字符串
function arrayToJsonString(o) { var len = o.length; var new_arr = new Array(); var str = \\\'\\\',strone=\\\'\\\',strs=\\\'\\\',jsonstr=\\\'\\\'; for(var i = 0;i<len;i++){ new_arr = o[i]; for(var k in new_arr){ strone += \\\'"\\\'+k+\\\'"\\\'+\\\':\\\'+\\\'"\\\'+new_arr[k]+\\\'"\\\'+\\\',\\\'; } str = \\\'{\\\'+strone.substring(0,strone.length-1)+\\\'}\\\'; strone=\\\'\\\'; strs += str+\\\',\\\'; new_arr=[]; } strs = \\\'[\\\'+strs.substring(0,strs.length-1)+\\\']\\\'; return strs;} 2、改变多维数组中某个元素的值，代码如下：
var sku_att_json_arr = new Array({$sku_att_json|raw});sku_att_json_arr[0][0][\\\'quantity\\\'] = 123;$(\\\'#sku_att_json\\\').val(arrayToJsonString(sku_att_json_arr[0]));