var pop = null    
var winCount = 0 
var winNameIni = "pop" 
winNameImagen = "imagen"
function openPopWin(winURL, winWidth, winHeight, winFeatures, winLeft, winTop){ 
  var d_winLeft = 20  
  var d_winTop = 20   
  winName = winNameIni + winCount++  
  closePopWin()           
  if (openPopWin.arguments.length >= 4)    
    winFeatures = "," + winFeatures 
  else  
    winFeatures = ""  
  if (openPopWin.arguments.length == 6)   
    winFeatures += getLocation(winWidth, winHeight, winLeft, winTop) 
  else 
    winFeatures += getLocation(winWidth, winHeight, d_winLeft, d_winTop) 
  pop = window.open(winURL, winName, "width=" + winWidth  
           + ",height=" + winHeight + winFeatures) 
  } 

function closePopWin(){     
  if (navigator.appName != "Microsoft Internet Explorer"  
      || parseInt(navigator.appVersion) >=4)  
    if(pop != null) if(!pop.closed) pop.close()  
  } 
function getLocation(winWidth, winHeight, winLeft, winTop){ 
  return "" 
  }