.trans_bg_overlay {
    z-index: 10000;
    filter: alpha(opacity=50); /*older IE*/
    filter:progid:DXImageTransform.Microsoft.Alpha(opacity=50); /* IE */
    -moz-opacity: .50; /*older Mozilla*/
    -khtml-opacity: 0.5;   /*older Safari*/
    opacity: 0.5;   /*supported by current Mozilla, Safari, and Opera*/
    background-color:#c0c0c0;
    position:fixed;
    top:0px;
    left:0px; 
    width:100%; 
    height:100%; 
    text-align:center; 
    vertical-align:middle;
}
 
.dialogContainer 
{
    z-index: 20000;
    position:fixed;
    top:0px;
    left:0px;
    width:100%;
    height:100%;
    background-color: transparent;
    text-align:center;
}