//~~~~~~~~~~~~~~~~~~~ START POP-UP WINDOWS ~~~~~~~~~~~~~~~~~~~
 <!--
 // Copyright 1999 - 2001 by Ray Stott, ver 2.0
 // OK to use on noncommercial sites as long as copyright is included
 // Commercial Sites, please see http://www.crays.com/jsc/jsCom.htm 
 // Script is available at http://www.crays.com/jsc          

 var popWin = null    // use this when referring to pop-up window
 var winCount = 0
 var winName = "popWin"
 function openPopWin(winURL, winWidth, winHeight, winFeatures, winLeft, winTop){
   var d_winLeft = 20  // default, pixels from screen left to window left
   var d_winTop = 20   // default, pixels from screen top to window top
   winName = "popWin" + winCount++ //unique name for each pop-up window
   closePopWin()           // close any previously opened pop-up window
   if (openPopWin.arguments.length >= 4)  // any additional features? 
     winFeatures = "," + winFeatures
   else 
     winFeatures = "" 
   if (openPopWin.arguments.length == 6)  // location specified
     winFeatures += getLocation(winWidth, winHeight, winLeft, winTop)
   else
     winFeatures += getLocation(winWidth, winHeight, d_winLeft, d_winTop)
   popWin = window.open(winURL, winName, "width=" + winWidth 
            + ",height=" + winHeight + winFeatures)
   }
 function closePopWin(){    // close pop-up window if it is open 
   if (navigator.appName != "Microsoft Internet Explorer" 
       || parseInt(navigator.appVersion) >=4) //do not close if early IE
     if(popWin != null) if(!popWin.closed) popWin.close() 
   }
 function getLocation(winWidth, winHeight, winLeft, winTop){
   return ""
   }
 //-->

// for Netscape 4+ and IE 4+
 <!--
 function getLocation(winWidth, winHeight, winLeft, winTop){
   var winLocation = ""
   if (winLeft < 0)
     winLeft = screen.width - winWidth + winLeft
   if (winTop < 0)
     winTop = screen.height - winHeight + winTop
   if (winTop == "cen")
     winTop = (screen.height - winHeight)/2 - 20
   if (winLeft == "cen")
     winLeft = (screen.width - winWidth)/2
   if (winLeft>0 & winTop>0)
     winLocation =  ",screenX=" + winLeft + ",left=" + winLeft   
                 + ",screenY=" + winTop + ",top=" + winTop
   else
     winLocation = ""
   return winLocation
   }
//-->