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 "" } 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 } var demoOff = new Image(55,25) var demoOn = new Image(55,25) var smileFace = new Image() var htmlCode = "" function loadImages(){ demoOff.src = "img/bodemo.jpg" demoOn.src = "img/bdemo.jpg" smileFace.src = "img/smile1.gif" } function popMsg(msg){ htmlCode = 'Message' + '
' + '' + '' + '' + '
' + '' + msg + '' + '
' + '
' + '
' openPopWin("docWrite.htm", 350, 130) } function setStatus(msg){ status = msg return true } function netscapeDoc(){ openPopWin("http://developer.netscape.com/docs/manuals/communicator/jsref/win1.htm#1152528", 650, 420, "toolbar,scrollbars,resizable,status") } function popWindow1(){ htmlCode = 'Limitations' + '
' + '' + '' + '' + '
' + '' + '


Limitations of the window.open() method include:' + '

  1. open pop-up windows are not closed ' + 'when a different web page is selected or browser is closed. ' + '
  2. pop-up windows can become lost ' + 'behind main window with no easy way to recall.
' + '
The openPopWin() function that is available here ' + 'provides additional coding to correct the above limitations. ' + 'You can test this by clicking on the main window to hide ' + 'this window and then bringing it back to the foreground by ' + 'clicking on the cartoon again. Moving to a different web ' + 'page or closing the web browser will close this window. ' + '
' + '
' + '
' + '
' openPopWin("docWrite.htm", 550, 370) // popWin.document.write(htmlCode) // popWin.document.close() }