.modal-open .dropdown-menu {
z-index: 2050;
}
.modal-open .dropdown.open {
*z-index: 2050;
}
.modal-open .popover {
z-index: 2060;
}
.modal-open .tooltip {
z-index: 2080;
}
.modal-backdrop {
position: fixed;
top: 0;
right: 0;
bottom: 0;
left: 0;
z-index: 1040;
background-color: #000;
}
.modal-backdrop.fade {
opacity: 0;
}
.modal-backdrop,
.modal-backdrop.fade.in {
opacity: 0.8;
filter: alpha(opacity=80);
}
div.modal {
position: fixed;
top: 50%;
left: 50%;
z-index: 1050;
overflow: auto;
width: 560px;
margin: -250px 0 0 -280px;
background-color: #fff;
border: 1px solid #999;
border: 1px solid rgba(0,0,0,0.3);
*border: 1px solid #999;
-webkit-border-radius: 6px;
-moz-border-radius: 6px;
border-radius: 6px;
-webkit-box-shadow: 0 3px 7px rgba(0,0,0,0.3);
-moz-box-shadow: 0 3px 7px rgba(0,0,0,0.3);
box-shadow: 0 3px 7px rgba(0,0,0,0.3);
-webkit-background-clip: padding-box;
-moz-background-clip: padding-box;
background-clip: padding-box;
}
div.modal.fade {
-webkit-transition: opacity .3s linear, top .3s ease-out;
-moz-transition: opacity .3s linear, top .3s ease-out;
-o-transition: opacity .3s linear, top .3s ease-out;
transition: opacity .3s linear, top .3s ease-out;
top: -25%;
}
div.modal.fade.in {
top: 50%;
}
.modal-header {
padding: 9px 15px;
border-bottom: 1px solid #eee;
}
.modal-header .close {
margin-top: 2px;
}
.modal-header h3 {
margin: 0;
line-height: 30px;
}
.modal-body {
overflow-y: auto;
max-height: 400px;
padding: 15px;
}
.modal-form {
margin-bottom: 0;
}
.modal-footer {
padding: 14px 15px 15px;
margin-bottom: 0;
text-align: right;
background-color: #f5f5f5;
border-top: 1px solid #ddd;
-webkit-border-radius: 0 0 6px 6px;
-moz-border-radius: 0 0 6px 6px;
border-radius: 0 0 6px 6px;
-webkit-box-shadow: inset 0 1px 0 #fff;
-moz-box-shadow: inset 0 1px 0 #fff;
box-shadow: inset 0 1px 0 #fff;
*zoom: 1;
}
.modal-footer:before,
.modal-footer:after {
display: table;
content: "";
line-height: 0;
}
.modal-footer:after {
clear: both;
}
.modal-footer .btn + .btn {
margin-left: 5px;
margin-bottom: 0;
}
.modal-footer .btn-group .btn + .btn {
margin-left: -1px;
}
And now the popup is display correctly.
The modal CSS added came from the default joomla 3 template.