function openWindow( strURL, winName) 
{   
  var xposition=0; 
  var yposition=0; 
  var iwidth=650;
  var iheight=590;

  if (navigator.appName.indexOf("Netscape")!=-1)
  {
    iwidth=690;
    iheight=650;
  }

  if ((parseInt(navigator.appVersion) >= 4 ))
  { 
    // Center the window.
    xposition = (screen.width - iwidth) / 2; 
    yposition = (screen.height - iheight) / 2; 
  } 

  args = "width=" + iwidth + "," 
    + "height=" + iheight + "," 
    + "location=0," 
    + "menubar=0," 
    + "resizable=1," 
    + "scrollbars=0," 
    + "status=0," 
    + "titlebar=0," 
    + "toolbar=0," 
    + "hotkeys=0," 
    + "screenx=" + xposition + ","  //NN Only 
    + "screeny=" + yposition + ","  //NN Only 
    + "left=" + xposition + ","     //IE Only 
    + "top=" + yposition;           //IE Only 

  window.open(
    "http://www.fmsinc.com/sam/script/referral/send.asp?url=" + strURL, 
    winName , 
    args); 
}