日历控件（日期类）在对话框中不起作用（Jquery）

I have created a Dialog box with some label and textboxes inside. Whenever the dialog box opens and after clicking on Date of birth textbox it is not displaying the Calender. But the same is working in normal window other than Dialog window.

Any idea?

Plz find snapshot @

http://s8.postimg.org/3quz7gvrp/untitled.png

In css increase the z-index of the calendar set it to 10000 you can do it by adding below code

div.ui-datepicker {
z-index: 10000;
}