<input type="text" value="{"id":"1","price":"30.00","edit":0},
{"id":"2","price":"8.00","edit":0}" id="json" />

**code:**
var json = $('#json').val().split(',');

for (var i = 0; i < json.length; i++){
  alert(json);
}
//(seems its splitting every comma it finds).

$.parseJSON("[" + $('#json').val() + "]");

<input type="text" value='{"id":"1","price":"30.00","edit":0},
{"id":"2","price":"8.00","edit":0}' id="json" />

<input type="text" value='{"id":"1","price":"30.00","edit":0},{"id":"2","price":"8.00","edit":0}' id="json" />

value='{"id":"1","price":"30.00","edit":0}, {"id":"2","price":"8.00","edit":0}'