var version4 = (navigator.appVersion.charAt(0) == "4"); 
			var popupHandle;
			 
			function closePopup() {
				if(popupHandle != null && !popupHandle.closed) popupHandle.close();
			}

			function displayPopup(position,url,name,height,width,evnt) {
				var properties = "scrollbars=yes, resizable=yes, toolbar = 0, location = 0, height = " + height;
				properties = properties + ", width=" + width;
				var leftprop, topprop, screenX, screenY, cursorX, cursorY, padAmt;

				if(navigator.appName == "Microsoft Internet Explorer") {
					screenY = document.body.offsetHeight;
					screenX = window.screen.availWidth;
				}
				else {
					screenY = window.outerHeight;
					screenX = window.outerWidth;
				}

				if(position == 1) {
					cursorX = evnt.screenX;
					cursorY = evnt.screenY;
					padAmtX = 10;
					padAmtY = 10;
					if((cursorY + height + padAmtY) > screenY) {padAmtY = (-30) + (height * -1);}
					if((cursorX + width + padAmtX) > screenX)  {padAmtX = (-30) + (width * -1);}

					if(navigator.appName == "Microsoft Internet Explorer") {
						leftprop = cursorX + padAmtX;
						topprop = cursorY + padAmtY;
					}
					else {
						leftprop = (cursorX - pageXOffset + padAmtX);
						topprop = (cursorY - pageYOffset + padAmtY);
					}
				}
				else{
					leftvar  = (screenX - width) / 2;
					rightvar = (screenY - height) / 2;

					if(navigator.appName == "Microsoft Internet Explorer") {
						leftprop = leftvar;
						topprop = rightvar;
					}
					else {
						leftprop = (leftvar - pageXOffset);
						topprop = (rightvar - pageYOffset);
					}
				}

				if(evnt != null) {
					properties = properties + ", left = " + leftprop;
					properties = properties + ", top = " + topprop;
				}

				closePopup();
				popupHandle = window.open(url,name,properties);
			}