Maintenance
"text/css" > #mydiv { position:fixed; top: 50%; left: 50%; width:30em; height:18em; margin-top: -9em; /*set to a negative number 1/2 of your height*/ margin-left: -15em; /*set to a negative number 1/2 of your width*/ eϠlPMVhOP1dr]eωPwnPxQ1