Timeout JS??

 iWebkit.closepopup = function () {
	        var o_parent = arguments[0].toElement;
	        var b_found = false;
	        do {
		        o_parent = o_parent.parentNode;
		        if (o_parent.tagName.toLowerCase() == 'div' && o_parent.className.toLowerCase() == 'popup') {
			        b_found = true;
			        break;
   	         }
	        } while (o_parent.parentNode);
	
	        if (b_found === false) {
                return false;
	        }
	        
            var o_frameclose = o_parent.getElementsByClassName('confirm_screenopen')[0];
            o_frameclose.className = 'confirm_screenclose';
              
   			
         
	        var b = document.getElementById("cover");
			b.className = "nocover";
		    b.style.height = 0;	
		    window.setTimeout(popupTimer(),2500);	
        };       
function popupTimer() {
 var o_parent = arguments[0].toElement;
var o_frameclose = o_parent.getElementsByClassName('confirm_screenclose')[0];

      o_frameclose.className = 'confirm_screen';      }