<script language="javascript" type="text/javascript">
var arr1 = [[30,-1,90],[70,100,-40],[39,29,6],[39,92,9]];
var arr2 = [];
//确定新数组有多少行
for(var i=0;i<arr1[0].length;i++){
arr2[i] = [];
}
//动态添加数据
//遍历原数组
for(var i=0;i<arr1.length;i++){
for(var j=0;j<arr1[i].length;j++){
arr2[j][i] = arr1[i][j];
}
}
//打印新数组
for(var i=0;i<arr2.length;i++){
for(var j=0;j<arr2[i].length;j++){
document.writeln(arr2[i][j]);
}
document.write("<br />");
}
</script>