Update Index.cshtml

Whenever we click on Create new Customer the pop-up of create form Was not appear proper in Middle on crome browser so made changes in CSS in this line 99
before
 <div id="my-modal" class="modal hide fade" style="width:850px;margin:-40% 0 0 -30%;">
After Change
 <div id="my-modal" class="modal hide fade" style="width:850px;margin:-40% 0 0 -30%;">