jquery dialog appears more than once in jquery tab

jquery dialog appears more than once in jquery tab

I applied jquery.dialog in the content ascx pages and it works fine. But when I have mutiple content pages using jquery tab control, when the popup comes and dragged to left or right of the screen, it get doubled.I have unique id in each content pages for dialog box.Please let me know where my problem resides.

Following is the code which I used in each content pages:

$("divModelPopup").dialog({
            width: 450,
            height: 200,
            modal: true,
            title: 'title of the content',
            show: 'slide',
            hide: 'slide',
            closeOnEscape: false,
            autoOpen: false
});