//JavaScript code for functions //*********************** // REVISION HISTORY // Date // 04.22.99 code inception // This file is put together to provide standardized JavaScript functionality // it is based on functions already inplace and in use in applications // and will be expanded as necessary // // 06.09.99 video_on_top functions added // premise: A pop-up window is useful for course structure // thus far it has been impossible to make sure that the // window had focus due to a bug in Browser 4.0 and the //

tag. This is the work-around. // // 06.28.99 The various open window functions have been added. Also the // winVideo function has been modified to work like the other // functions produced. // // 11.01.99 Rearranged masterWindowOpen so it moves window to specified // location first, then loads the necessary page. Added 'var' // statement as potential bug fix for erratic behavior in courses. // // 11.05.99 bug fix to ClosePopUp -- added top. for multi-frame pop-ups. // // FUNCTION LIST // Date Function Name Brief Summary // // 04.22.99 preloadImages loads roll-overs into memory as a page loads // 04.22.99 switchImg switches images for roll-overs // modified 08.12.99 // 06.10.99 myPlayVideo(modified) plays video in a pop-up window // 06.10.99 myFocusVideo controls focus of pop-up window // 06.10.99 vidCleanUp defensive coding for closing vid window (very necessary) // modified 08.12.99 // 06.10.99 mainCleanUp defensive coding for closing main window (very necessary) // 06.28.99 winVideo modified, used to be myPlayVideo // 06.28.99 winNoScroll opens a window with no scroll bars // 06.28.99 winScroll opens a window with scroll bars // 06.28.99 winCenterScroll opens a window centered on the screen with scroll bars // 06.28.99 winCenterNoScroll opens a window centered on the screen with no scroll bars // 06.28.99 masterWindowOpen main function to open a window // 08.10.99 winScrollTB opens a window with scroll bars and toolbar // 11.05.99 ClosePopUp closes a pop-up window and focuses the opener // 02.15.00 cleanUp closes a pop-up window and relocates the opener //*********************** //****************************************************************************** //* Name: preloadImages //* Parameters: any comma-delimited string of image names //* Returns: //* Notes: loads the specified graphics into the cache //*Usage: //****************************************************************************** function preloadImages() { // make sure the document has images if (document.images) { // inititialize the preLoad Object if (typeof document.preLoad == 'undefined'){ document.preLoad = new Object(); } document.preLoad.loadedImages = new Array(); // make an Array to stick the loadedImages into var argLength = preloadImages.arguments.length; // length of the passed in arguments // loop through the array for(arg=0; arg < argLength; arg++) { // make a new Image document.preLoad.loadedImages[arg] = new Image(); // load the image into memory document.preLoad.loadedImages[arg].src = preloadImages.arguments[arg]; } } }// end preloadImages //****************************************************************************** //* Name: switchImg //* Parameters: imageName = the image name in the tag // imgageSrc = an image file with complete path //* Returns: //* Notes: assigns the image to the document object //* Usage: eg. onMouseOver="switchImg('imageName', 'images/image.gif')" //****************************************************************************** function switchImg(imageName, imageSrc) { if (document.images) { document.images[imageName].src = imageSrc; } }// end switchImg //****************************************************************************** //* Name: winVideo //* Parameters: videoSrc -- an html file with the embeded video content //* Returns: nothing //* Notes: must be used with myFocusVideo() script to keep the video window on top //* the variable myVidWin must be declared null outside myPlayVideo, //* as it is also used by myFocusVideo(). //* If no (X,Y) location is specified, the window is centered. //* Usage: link text //****************************************************************************** var myVidWin = null; //function winVideo(winUrl, winName, winWidth, winHeight, winX, winY) { function winVideo(winUrl, winName, winWidth, winHeight, winX, winY) { var winFeatures = "width=" + winWidth + ",height=" + winHeight + ",scrollbars=no"; if (arguments.length == 4) { //do math to center window var screenH = screen.availHeight; var screenW = screen.availWidth; var moveX = (screenW - winWidth)/2; var moveY = (screenH - winHeight)/2; myVidWin = masterWindowOpen(winUrl, winName, winFeatures, moveX, moveY); } else { myVidWin = masterWindowOpen(winUrl, winName, winFeatures, winX, winY); } } //end winVideo //****************************************************************************** //* Name: myFocusVideo //* Parameters: videoWin //* Returns: nothing //* Notes: this script makes a pop-up video window never loose focus. //* the pop-up window must have myCleanUp() script. //* Usage: //****************************************************************************** function myFocusVideo(myVid) { if (!myVid || myVid.closed){ window.focus(); } else if (!myVid.closed) { myVid.focus(); } } //end myFocusVideo //****************************************************************************** //* Name: vidCleanUp //* Parameters: none //* Returns: nothing //* Notes: Sets parent window variable to null so myFocusVideo will work in IE //* The appName check is necessary bcs Netscape can actually switch videos //* without closing the window. //* This function is NOT on the close function so that the clean-up will still occur if //* the window is closesd with the X box in the upper right //* There should be no reference to visclnt.js in the