function popup(){
// setup a controlled popup window
	// state the web address, window name, width and height of popup
	var myURL = (arguments[0])? arguments[0]:'http://www.jimmont.com/resrc/src/', popupName = (arguments[1])? arguments[1]:'mySite', popupWidth = 320, popupHeight = 270, mypopup;
	// calculate the left edge (x position) of the popup window; if we can't get the screen width then make it 20 pixels (after the : )
	var popupX = (screen.availWidth)? ((screen.availWidth - popupWidth) / 2): 20;
	// calculate the top edge (y position) of the popup window; if we can't get the screen heigth then make it 20 pixels
	var popupY = (screen.availHeight)? ((screen.availHeight - popupHeight) / 3):20;
	// popup window chrome details: 0 is same as no, 1 is same as yes
	var details = 'toolbar=0,location=0,directories=0,status=0,menubar=0,scrollbars=0,resizable=1,width='+popupWidth+',height='+popupHeight+',top='+popupY+',left='+popupX;
	// now create the popup and assign it to a variable
	mypopup = window.open(myURL,popupName,details);
	// give focus to our popup window, important if it's in the background
	mypopup.focus();
}