An fix calender date pursing while asset update

The date was not correctly pursed due to format mismatch while adding date box script to the form element(s). The script is now modified accordingly and also tested in Firefox (*other browser than chrome) and found working as expected, hence fixed.

![calendar_fix](https://f.cloud.github.com/assets/6417646/2420725/af9da15a-ab76-11e3-9335-bcc26b5e3128.png)