/****************************************************************************** * dhtmllib.js * * * * Copyright 1999 by Mike Hall. * Visit http://www.dynamicdrive.com * * * Last update: November 30, 1999. * * * * Provides basic functions for DHTML positioned elements which will work on * * both Netscape Communicator and Internet Explorer browsers (version 4.0 and * * up). * ******************************************************************************/ // 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); }