// Determine browser. var isMinNS4 = (navigator.appName.indexOf("Netscape") >= 0 && parseFloat(navigator.appVersion) >= 4) ? 1 : 0; var isMinIE4 = (document.all) ? 1 : 0; var isMinIE5 = (isMinIE4 && navigator.appVersion.indexOf("5.")) >= 0 ? 1 : 0; //----------------------------------------------------------------------------- // Layer visibility. //----------------------------------------------------------------------------- function hideLayer(layer) { if (isMinNS4) layer.visibility = "hide"; if (isMinIE4) layer.style.visibility = "hidden"; } function showLayer(layer) { if (isMinNS4) layer.visibility = "show"; if (isMinIE4) layer.style.visibility = "visible"; } function isVisible(layer) { if (isMinNS4 && layer.visibility == "show") return(true); if (isMinIE4 && layer.style.visibility == "visible") return(true); return(false); } //----------------------------------------------------------------------------- // Layer positioning. //----------------------------------------------------------------------------- function moveLayerTo(layer, x, y) { if (isMinNS4) layer.moveTo(x, y); if (isMinIE4) { layer.style.left = x; layer.style.top = y; } } function moveLayerBy(layer, dx, dy) { if (isMinNS4) layer.moveBy(dx, dy); if (isMinIE4) { layer.style.pixelLeft += dx; layer.style.pixelTop += dy; } } function getLeft(layer) { if (isMinNS4) return(layer.left); if (isMinIE4) return(layer.style.pixelLeft); return(-1); } function getTop(layer) { if (isMinNS4) return(layer.top); if (isMinIE4) return(layer.style.pixelTop); return(-1); } function getRight(layer) { if (isMinNS4) return(layer.left + getWidth(layer)); if (isMinIE4) return(layer.style.pixelLeft + getWidth(layer)); return(-1); } function getBottom(layer) { if (isMinNS4) return(layer.top + getHeight(layer)); else if (isMinIE4) return(layer.style.pixelTop + getHeight(layer)); return(-1); } function getPageLeft(layer) { if (isMinNS4) return(layer.pageX); if (isMinIE4) return(layer.offsetLeft); return(-1); } function getPageTop(layer) { if (isMinNS4) return(layer.pageY); if (isMinIE4) return(layer.offsetTop); return(-1); } function getWidth(layer) { if (isMinNS4) { if (layer.document.width) return(layer.document.width); else return(layer.clip.right - layer.clip.left); } if (isMinIE4) { if (layer.style.pixelWidth) return(layer.style.pixelWidth); else return(layer.clientWidth); } return(-1); } function getHeight(layer) { if (isMinNS4) { if (layer.document.height) return(layer.document.height); else return(layer.clip.bottom - layer.clip.top); } if (isMinIE4) { if (false && layer.style.pixelHeight) return(layer.style.pixelHeight); else return(layer.clientHeight); } return(-1); } function getzIndex(layer) { if (isMinNS4) return(layer.zIndex); if (isMinIE4) return(layer.style.zIndex); return(-1); } function setzIndex(layer, z) { if (isMinNS4) layer.zIndex = z; if (isMinIE4) layer.style.zIndex = z; } //----------------------------------------------------------------------------- // Layer clipping. //----------------------------------------------------------------------------- function clipLayer(layer, clipleft, cliptop, clipright, clipbottom) { if (isMinNS4) { layer.clip.left = clipleft; layer.clip.top = cliptop; layer.clip.right = clipright; layer.clip.bottom = clipbottom; } if (isMinIE4) layer.style.clip = 'rect(' + cliptop + ' ' + clipright + ' ' + clipbottom + ' ' + clipleft +')'; } function getClipLeft(layer) { if (isMinNS4) return(layer.clip.left); if (isMinIE4) { var str = layer.style.clip; if (!str) return(0); var clip = getIEClipValues(layer.style.clip); return(clip[3]); } return(-1); } function getClipTop(layer) { if (isMinNS4) return(layer.clip.top); if (isMinIE4) { var str = layer.style.clip; if (!str) return(0); var clip = getIEClipValues(layer.style.clip); return(clip[0]); } return(-1); } function getClipRight(layer) { if (isMinNS4) return(layer.clip.right); if (isMinIE4) { var str = layer.style.clip; if (!str) return(layer.style.pixelWidth); var clip = getIEClipValues(layer.style.clip); return(clip[1]); } return(-1); } function getClipBottom(layer) { if (isMinNS4) return(layer.clip.bottom); if (isMinIE4) { var str = layer.style.clip; if (!str) return(layer.style.pixelHeight); var clip = getIEClipValues(layer.style.clip); return(clip[2]); } return(-1); } function getClipWidth(layer) { if (isMinNS4) return(layer.clip.width); if (isMinIE4) { var str = layer.style.clip; if (!str) return(layer.style.pixelWidth); var clip = getIEClipValues(layer.style.clip); return(clip[1] - clip[3]); } return(-1); } function getClipHeight(layer) { if (isMinNS4) return(layer.clip.height); if (isMinIE4) { var str = layer.style.clip; if (!str) return(layer.style.pixelHeight); var clip = getIEClipValues(layer.style.clip); return(clip[2] - clip[0]); } return(-1); } function getIEClipValues(str) { var clip = new Array(); var i; // Parse out the clipping values for IE layers. i = str.indexOf("("); clip[0] = parseInt(str.substring(i + 1, str.length), 10); i = str.indexOf(" ", i + 1); clip[1] = parseInt(str.substring(i + 1, str.length), 10); i = str.indexOf(" ", i + 1); clip[2] = parseInt(str.substring(i + 1, str.length), 10); i = str.indexOf(" ", i + 1); clip[3] = parseInt(str.substring(i + 1, str.length), 10); return(clip); } //----------------------------------------------------------------------------- // Layer scrolling. //----------------------------------------------------------------------------- function scrollLayerTo(layer, x, y, bound) { var dx = getClipLeft(layer) - x; var dy = getClipTop(layer) - y; scrollLayerBy(layer, -dx, -dy, bound); } function scrollLayerBy(layer, dx, dy, bound) { var cl = getClipLeft(layer); var ct = getClipTop(layer); var cr = getClipRight(layer); var cb = getClipBottom(layer); if (bound) { if (cl + dx < 0) dx = -cl; else if (cr + dx > getWidth(layer)) dx = getWidth(layer) - cr; if (ct + dy < 0) dy = -ct; else if (cb + dy > getHeight(layer)) dy = getHeight(layer) - cb; } clipLayer(layer, cl + dx, ct + dy, cr + dx, cb + dy); moveLayerBy(layer, -dx, -dy); } //----------------------------------------------------------------------------- // Layer background. //----------------------------------------------------------------------------- function setBgColor(layer, color) { if (isMinNS4) layer.bgColor = color; if (isMinIE4) layer.style.backgroundColor = color; } function setBgImage(layer, src) { if (isMinNS4) layer.background.src = src; if (isMinIE4) layer.style.backgroundImage = "url(" + src + ")"; } //----------------------------------------------------------------------------- // Layer utilities. //----------------------------------------------------------------------------- function getLayer(name) { if (isMinNS4) return findLayer(name, document); if (isMinIE4) return eval('document.all.' + name); return null; } function findLayer(name, doc) { var i, layer; for (i = 0; i < doc.layers.length; i++) { layer = doc.layers[i]; if (layer.name == name) return layer; if (layer.document.layers.length > 0) { layer = findLayer(name, layer.document); if (layer != null) return layer; } } return null; } //----------------------------------------------------------------------------- // Window and page properties. //----------------------------------------------------------------------------- function getWindowWidth() { if (isMinNS4) return(window.innerWidth); if (isMinIE4) return(document.body.clientWidth); return(-1); } function getWindowHeight() { if (isMinNS4) return(window.innerHeight); if (isMinIE4) return(document.body.clientHeight); return(-1); } function getPageWidth() { if (isMinNS4) return(document.width); if (isMinIE4) return(document.body.scrollWidth); return(-1); } function getPageHeight() { if (isMinNS4) return(document.height); if (isMinIE4) return(document.body.scrollHeight); return(-1); } function getPageScrollX() { if (isMinNS4) return(window.pageXOffset); if (isMinIE4) return(document.body.scrollLeft); return(-1); } function getPageScrollY() { if (isMinNS4) return(window.pageYOffset); if (isMinIE4) return(document.body.scrollTop); return(-1); } //***************************************************************************** // Scroller constructor. //***************************************************************************** function Scroller(x, y, width, height, border, padding) { this.x = x; this.y = y; this.width = width; this.height = height; this.border = border; this.padding = padding; this.items = new Array(); this.created = false; // Set default colors. this.fgColor = "#000000"; this.bgColor = "#ffffff"; this.bdColor = "#000000"; // Set default font. this.fontFace = "Arial,Helvetica"; this.fontSize = "2"; // Set default scroll timing values. this.speed = 50; this.pauseTime = 2000; // Define methods. this.setColors = scrollerSetColors; this.setFont = scrollerSetFont; this.setSpeed = scrollerSetSpeed; this.setPause = scrollersetPause; this.addItem = scrollerAddItem; this.create = scrollerCreate; this.show = scrollerShow; this.hide = scrollerHide; this.moveTo = scrollerMoveTo; this.moveBy = scrollerMoveBy; this.getzIndex = scrollerGetzIndex; this.setzIndex = scrollerSetzIndex; this.stop = scrollerStop; this.start = scrollerStart; } //***************************************************************************** // Scroller methods. //***************************************************************************** function scrollerSetColors(fgcolor, bgcolor, bdcolor) { if (this.created) { alert("Scroller Error: Scroller has already been created."); return; } this.fgColor = fgcolor; this.bgColor = bgcolor; this.bdColor = bdcolor; } function scrollerSetFont(face, size) { if (this.created) { alert("Scroller Error: Scroller has already been created."); return; } this.fontFace = face; this.fontSize = size; } function scrollerSetSpeed(pps) { if (this.created) { alert("Scroller Error: Scroller has already been created."); return; } this.speed = pps; } function scrollersetPause(ms) { if (this.created) { alert("Scroller Error: Scroller has already been created."); return; } this.pauseTime = ms; } function scrollerAddItem(str) { if (this.created) { alert("Scroller Error: Scroller has already been created."); return; } this.items[this.items.length] = str; } function scrollerCreate() { var start, end; var str; var i, j; var x, y; if (!isMinNS4 && !isMinIE4) return; // On first scroller, start interval timer. if (scrollerList.length == 0) setInterval('scrollerGo()', scrollerInterval); // Create the scroller only once. if (this.created) { alert("Scroller Error: Scroller has already been created."); return; } this.created = true; // Copy first item to the end of the list, this lets us scroll from the last // defined item to the first without jumping. this.items[this.items.length] = this.items[0]; // Set up HTML code for item text. start = '' + '
' + ''; end = '
'; // Build the layers. if (isMinNS4) { this.baseLayer = new Layer(this.width); this.scrollLayer = new Layer(this.width, this.baseLayer); this.scrollLayer.visibility = "inherit"; this.itemLayers = new Array(); for (i = 0; i < this.items.length; i++) { this.itemLayers[i] = new Layer(this.width, this.scrollLayer); this.itemLayers[i].document.open(); this.itemLayers[i].document.writeln(start + this.items[i] + end); this.itemLayers[i].document.close(); this.itemLayers[i].visibility = "inherit"; } // Set background colors. setBgColor(this.baseLayer, this.bdColor); setBgColor(this.scrollLayer, this.bgColor); } if (isMinIE4) { i = scrollerList.length; str = '
\n' + '
\n'; for (j = 0; j < this.items.length; j++) { str += '
\n' + start + this.items[j] + end + '
\n'; } str += '
\n' + '
\n'; // Insert HTML code at end of page. For IE4, need to scroll window to // end of page, insert and scroll back to correct bug. if (!isMinIE5) { x = getPageScrollX(); y = getPageScrollY(); window.scrollTo(getPageWidth(), getPageHeight()); } document.body.insertAdjacentHTML("beforeEnd", str); if (!isMinIE5) window.scrollTo(x, y); // Get handles to each layer. this.baseLayer = getLayer("scroller" + i + "_baseLayer"); this.scrollLayer = getLayer("scroller" + i + "_scrollLayer"); this.itemLayers = new Array(); for (j = 0; j < this.items.length; j++) this.itemLayers[j] = getLayer("scroller" + i + "_itemLayers" + j); } // Position and clip base and scroll layers. moveLayerTo(this.baseLayer, this.x, this.y); clipLayer(this.baseLayer, 0, 0, this.width, this.height); moveLayerTo(this.scrollLayer, this.border, this.border); clipLayer(this.scrollLayer, 0, 0, this.width - 2 * this.border, this.height - 2 * this.border); // Position and clip each item layer. x = 0; y = 0; for (i = 0; i < this.items.length; i++) { moveLayerTo(this.itemLayers[i], x, y); clipLayer(this.itemLayers[i], 0, 0, this.width, this.height); y += this.height; } // Set up scrolling parameters. this.stopped = false; this.currentY = 0; this.stepY = this.speed / (1000 / scrollerInterval); this.stepY = Math.min(this.height, this.stepY); this.nextY = this.height; this.maxY = this.height * (this.items.length - 1); this.paused = true; this.counter = 0; // Add to global list. scrollerList[scrollerList.length] = this; // Display it. showLayer(this.baseLayer); } function scrollerShow() { if (this.created) showLayer(this.baseLayer); } function scrollerHide() { if (this.created) hideLayer(this.baseLayer); } function scrollerMoveTo(x, y) { if (this.created) moveLayerTo(this.baseLayer, x, y); } function scrollerMoveBy(dx, dy) { if (this.created) moveLayerBy(this.baseLayer, dx, dy); } function scrollerGetzIndex() { if (this.created) return(getzIndex(this.baseLayer)); else return(0); } function scrollerSetzIndex(z) { if (this.created) setzIndex(this.baseLayer, z); } function scrollerStart() { this.stopped = false; } function scrollerStop() { this.stopped = true; } //***************************************************************************** // Code for scrolling. //***************************************************************************** // An array is used to hold a pointer to each scroller that is defined. The // scrollerGo() function runs at regular intervals and updates each scroller // in this list. var scrollerList = new Array(); var scrollerInterval = 20; function scrollerGo() { var i; // Update each scroller object in the list. for (i = 0; i < scrollerList.length; i++) { // If stopped, skip. if (scrollerList[i].stopped); // If paused, update counter. else if (scrollerList[i].paused) { scrollerList[i].counter += scrollerInterval; if (scrollerList[i].counter > scrollerList[i].pauseTime) scrollerList[i].paused = false; } // Scroll it. else { scrollerList[i].currentY += scrollerList[i].stepY; // Pause it if the next item has scrolled into view. if (scrollerList[i].currentY >= scrollerList[i].nextY) { scrollerList[i].paused = true; scrollerList[i].counter = 0; scrollerList[i].currentY = scrollerList[i].nextY; scrollerList[i].nextY += scrollerList[i].height; } // When we reach the end, start over. if (scrollerList[i].currentY >= scrollerList[i].maxY) { scrollerList[i].currentY -= scrollerList[i].maxY; scrollerList[i].nextY = scrollerList[i].height; } scrollLayerTo(scrollerList[i].scrollLayer, 0, Math.round(scrollerList[i].currentY), false); } } } //***************************************************************************** // Code to handle a window resize. //***************************************************************************** // These variables are used to determine if a resize event is a true one. // Necessary due to a bug in older NS4 releases. var origWidth; var origHeight; // Fix for resize bug. if (isMinNS4) { origWidth = window.innerWidth; origHeight = window.innerHeight; } //window.onresize = scrollerReload; function scrollerReload() { // Reload page in case of a browser resize. First make sure it's a true // resize. if (isMinNS4 && origWidth == window.innerWidth && origHeight == window.innerHeight) return; window.location.href = window.location.href; }