JavaScript中的对象到字符串的转换问题

Question

I have a JQuery that records all the immediate parent lists when a child list is clicked.

Example -

- Parent1  
  - Child1
     - GrandChild1
     - Grandchild2
     - Grandchild3
  - Child2
     - Grandchild4
     - Grandchild5

Clicking on Grandchild2 will record Parent1, Child1 and Grandchild2.

I want to use JQuery, JS and Cookies to print a value in another page when something is clicked in this list page. However the following codes doesn't work. Kindly help.

JQUERY and JS Code - (for the list page)

function objToString (obj) {
            var str = '';
            for (var p in obj) {
                if (obj.hasOwnProperty(p)) {
                    str += p + '::' + obj[p] + '\n';
                }
            }
            return str;
        }

        $(document).ready(function() {
            $('li').click(function() {
                var obj = $(this).parents('li').add(this);
                obj.css('color', 'red');
                var data= "data=";
                document.cookie = data+objToString(obj);
            });
        });

PHP Code - (for the page where the list data is to be printed)

echo $_COOKIE['data'];

The PHP Code should print Parent1 Child1 Grandchild2 for the above example. Also all functionalities should be IE 7 compatible. Only problem I face is that objToString doesn't work properly here.

Answer 1

Use JSON.stringify instead. This function converts any Object to String, concatinating the keys and values.

Example:-

var obj = {a:"b", f:{c:"d"},e:"e"};
JSON.stringify(obj); 

Output:-

"{"a":"b","f":{"c":"d"},"e":"e"}" .