用层（DIV)来实现弹出窗口
现在网上有很的软件用来阻止网页中的弹出窗口，本来倒是好事，用户可以根据需要来阻止那些广告什么的。但有很多这种小软件是流氓软件，不知不觉中这装上去了，很多人还装了很多，但又不会设置。这就要我们程序员，来很办法避开这些软件，让用户看到我们所要展示的内容。用户层来模拟弹出窗口，是个不错的选择。
如下图所示：
上面的客户信息窗体就是通过层模拟出来的。
下面是源代码：
windemo.html
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN" ><HTML> <HEAD> <title>windemo1</title> <meta name="GENERATOR" Content="Microsoft Visual Studio .NET 7.1"> <meta name="CODE_LANGUAGE" Content="C#"> <meta name="vs_defaultClientScript" content="JavaScript"> <meta name="vs_targetSchema" content="http://schemas.microsoft.com/intellisense/ie5"> <link type="text/css" href="win/win.css" rel="stylesheet"> <script src="win/win.js" language="javascript">
</script> </HEAD> <body> <form id="Form1" method="post" runat="server"> <A onclick="if (winList['sample2']) winList['sample2'].open('table.aspx'); return false;" href="#">客户信息列表</A> <DIV class="window" id="sample2" style="WIDTH: 870px"> <DIV class="titleBar"> <SPAN class="titleBarText"><img src="win/MSN.ICO" height="14"> 客户信息</SPAN> <IMG class="titleBarButtons" alt="" useMap="#sampleMap2" src="win/buttons.gif"> <MAP id="sampleMap2" name="sampleMap2"> <AREA title="Minimize" onclick="this.parentWindow.minimize();return false;" shape="RECT" alt="最小化" coords="0,0,15,13"> <AREA title="Restore" onclick="this.parentWindow.restore();return false;" shape="RECT" alt="还原" coords="16,0,31,13"> <AREA title="Close" onclick="this.parentWindow.close();return false;" shape="RECT" alt="关闭" coords="34,0,49,13"> </MAP> </DIV> <DIV class="clientArea" style="HEIGHT: 530px"> <iframe id="iurl" frameborder="0" style="MARGIN: 0px" src="" width="100%" height="100%"> </iframe> </DIV> </DIV> </form> </body></HTML>win.css
.lastLine {}{ PADDING-LEFT: 6em }.window {}{
BORDER-RIGHT: #606060 2px solid; PADDING-RIGHT: 2px; BORDER-TOP: #f0f0f0 2px solid; PADDING-LEFT: 2px; VISIBILITY: hidden; PADDING-BOTTOM: 2px; MARGIN: 0px; BORDER-LEFT: #d0d0d0 2px solid; PADDING-TOP: 2px; BORDER-BOTTOM: #404040 2px solid; POSITION: absolute; BACKGROUND-COLOR: #c0c0c0; TEXT-ALIGN: left }.titleBar {}{ PADDING-RIGHT: 2px; PADDING-LEFT: 0.5em; FONT-WEIGHT: bold; FONT-SIZE: 8pt; PADDING-BOTTOM: 2px; MARGIN: 0px; CURSOR: default; COLOR: #ffffff; PADDING-TOP: 2px; FONT-FAMILY: "MS Sans Serif", "Arial", "Helvetica", sans-serif; WHITE-SPACE: nowrap; BACKGROUND-COLOR:#0054e3; TEXT-ALIGN: right }.titleBarText {}{ FLOAT: left; OVERFLOW: hidden; TEXT-ALIGN: left; }.titleBarButtons {}{ BORDER-RIGHT: 0px; BORDER-TOP: 0px; VERTICAL-ALIGN: middle; BORDER-LEFT: 0px; WIDTH: 50px; BORDER-BOTTOM: 0px; HEIGHT: 14px; }.clientArea {}{ BORDER-RIGHT: #e0e0e0 2px solid; PADDING-RIGHT: 0.0em; BORDER-TOP: #404040 2px solid; PADDING-LEFT: 0.0em; FONT-SIZE: 10pt; PADDING-BOTTOM: 0.0em; MARGIN: 2px 0px 0px; OVERFLOW: auto; BORDER-LEFT: #505050 2px solid; COLOR: #000000; PADDING-TOP: 0.0em; BORDER-BOTTOM: #f0f0f0 2px solid; FONT-FAMILY: "Arial", "Helvetica", sans-serif; BACKGROUND-COLOR: #ffffff; height:100%; width:100% }win.js
//<
if ((i = ua.indexOf(s)) >= 0) { this.isIE = true; this.version = parseFloat(ua.substr(i + s.length)); return;
} s = "Netscape6/"; if ((i = ua.indexOf(s)) >= 0) { this.isNS = true; this.version = parseFloat(ua.substr(i + s.length)); return; } // Treat any other "Gecko" browser as NS 6.1. s = "Gecko"; if ((i = ua.indexOf(s)) >= 0) { this.isNS = true; this.version = 6.1; return; }}var browser = new Browser();//=============================================================================// Window Object//=============================================================================function Window(el) { var i, mapList, mapName; // Get window components. this.frame = el; this.titleBar = winFindByClassName(el, "titleBar"); this.titleBarText = winFindByClassName(el, "titleBarText"); this.titleBarButtons = winFindByClassName(el, "titleBarButtons"); this.clientArea = winFindByClassName(el, "clientArea"); // Find matching button image map. mapName = this.titleBarButtons.useMap.substr(1); mapList = document.getElementsByTagName("MAP"); for (i = 0; i < mapList.length; i++) if (mapList[i].name == mapName) this.titleBarMap = mapList[i]; // Save colors. this.activeFrameBackgroundColor = this.frame.style.backgroundColor; this.activeFrameBorderColor = this.frame.style.borderColor; this.activeTitleBarColor = this.titleBar.style.backgroundColor; this.activeTitleTextColor = this.titleBar.style.color; this.activeClientAreaBorderColor = this.clientArea.style.borderColor; if (browser.isIE) this.activeClientAreaScrollbarColor = this.clientArea.style.scrollbarBaseColor; // Save images. this.activeButtonsImage = this.titleBarButtons.src; this.inactiveButtonsImage = this.titleBarButtons.longDesc; // Set flags. this.isOpen = false; this.isMinimized = false; // Set methods. this.open = winOpen; this.close = winClose; this.minimize = winMinimize; this.restore = winRestore; this.makeActive = winMakeActive; // Set up event handling. this.frame.parentWindow = this; this.frame.onmousemove = winResizeCursorSet; this.frame.onmouseout = winResizeCursorRestore; this.frame.onmousedown = winResizeDragStart; this.titleBar.parentWindow = this; this.titleBar.onmousedown = winMoveDragStart; this.clientArea.parentWindow = this; this.clientArea.onclick = winClientAreaClick; for (i = 0; i < this.titleBarMap.childNodes.length; i++) if (this.titleBarMap.childNodes[i].tagName == "AREA") this.titleBarMap.childNodes[i].parentWindow = this; // Calculate the minimum width and height values for resizing // and fix any initial display problems. var initLt, initWd, w, dw; // Save the inital frame width and position, then reposition // the window. initLt = this.frame.style.left; initWd = parseInt(this.frame.style.width); this.frame.style.left = -this.titleBarText.offsetWidth + "px"; // For IE, start calculating the value to use when setting // the client area width based on the frame width. if (browser.isIE) { this.titleBarText.style.display = "none"; w = this.clientArea.offsetWidth; this.widthDiff = this.frame.offsetWidth - w; this.clientArea.style.width = w + "px"; dw = this.clientArea.offsetWidth - w; w -= dw; this.widthDiff += dw; this.titleBarText.style.display = ""; } // Find the difference between the frame's style and offset // widths. For IE, adjust the client area/frame width // difference accordingly. w = this.frame.offsetWidth; this.frame.style.width = w + "px"; dw = this.frame.offsetWidth - w; w -= dw; this.frame.style.width = w + "px"; if (browser.isIE) this.widthDiff -= dw; // Find the minimum width for resize. this.isOpen = true; // Flag as open so minimize call will work. this.minimize(); // Get the minimum width. if (browser.isNS && browser.version >= 1.2) // For later versions of Gecko. this.minimumWidth = this.frame.offsetWidth; else // For all others. this.minimumWidth = this.frame.offsetWidth - dw; // Find the frame width at which or below the title bar text will // need to be clipped. this.titleBarText.style.width = ""; this.clipTextMinimumWidth = this.frame.offsetWidth - dw; // Set the minimum height. this.minimumHeight = 1; // Restore window. For IE, set client area width. this.restore(); this.isOpen = false; // Reset flag. initWd = Math.max(initWd, this.minimumWidth); this.frame.style.width = initWd + "px"; if (browser.isIE) this.clientArea.style.width = (initWd - this.widthDiff) + "px"; // Clip the title bar text if needed. if (this.clipTextMinimumWidth >= this.minimumWidth) this.titleBarText.style.width = (winCtrl.minimizedTextWidth + initWd - this.minimumWidth) + "px"; // Restore the window to its original position. this.frame.style.left = initLt;}//=============================================================================// Window Methods//=============================================================================function winOpen() { if (this.isOpen) return; // Restore the window and make it visible. this.makeActive(); this.isOpen = true; if (this.isMinimized) this.restore(); this.frame.style.visibility = "visible"; if(arguments[0]!=null) { var iurl = document.getElementById("iurl"); iurl.setAttribute("src",arguments[0]); }}function winClose() { // Hide the window. this.frame.style.visibility = "hidden"; this.isOpen = false;}function winMinimize() { if (!this.isOpen || this.isMinimized) return; this.makeActive(); // Save current frame and title bar text widths. this.restoreFrameWidth = this.frame.style.width; this.restoreTextWidth = this.titleBarText.style.width; // Disable client area display. this.clientArea.style.display = "none"; // Minimize frame and title bar text widths. if (this.minimumWidth) this.frame.style.width = this.minimumWidth + "px"; else this.frame.style.width = ""; this.titleBarText.style.width = winCtrl.minimizedTextWidth + "px"; this.isMinimized = true;}function winRestore() { if (!this.isOpen || !this.isMinimized) return; this.makeActive(); // Enable client area display. this.clientArea.style.display = ""; // Restore frame and title bar text widths. this.frame.style.width = this.restoreFrameWidth; this.titleBarText.style.width = this.restoreTextWidth; this.isMinimized = false;}function winMakeActive() { if (winCtrl.active == this) return; // Inactivate the currently active window. if (winCtrl.active) { winCtrl.active.frame.style.backgroundColor = winCtrl.inactiveFrameBackgroundColor; winCtrl.active.frame.style.borderColor = winCtrl.inactiveFrameBorderColor; winCtrl.active.titleBar.style.backgroundColor = winCtrl.inactiveTitleBarColor; winCtrl.active.titleBar.style.color = winCtrl.inactiveTitleTextColor; winCtrl.active.clientArea.style.borderColor = winCtrl.inactiveClientAreaBorderColor; if (browser.isIE) winCtrl.active.clientArea.style.scrollbarBaseColor = winCtrl.inactiveClientAreaScrollbarColor; if (browser.isNS && browser.version < 6.1) winCtrl.active.clientArea.style.overflow = "hidden"; if (winCtrl.active.inactiveButtonsImage) winCtrl.active.titleBarButtons.src = winCtrl.active.inactiveButtonsImage; } // Activate this window. this.frame.style.backgroundColor = this.activeFrameBackgroundColor; this.frame.style.borderColor = this.activeFrameBorderColor; this.titleBar.style.backgroundColor = this.activeTitleBarColor; this.titleBar.style.color = this.activeTitleTextColor; this.clientArea.style.borderColor = this.activeClientAreaBorderColor; if (browser.isIE) this.clientArea.style.scrollbarBaseColor = this.activeClientAreaScrollbarColor; if (browser.isNS && browser.version < 6.1) this.clientArea.style.overflow = "auto"; if (this.inactiveButtonsImage) this.titleBarButtons.src = this.activeButtonsImage; this.frame.style.zIndex = ++winCtrl.maxzIndex; winCtrl.active = this;}//=============================================================================// Event handlers.//=============================================================================function winClientAreaClick(event) { // Make this window the active one. this.parentWindow.makeActive();}//-----------------------------------------------------------------------------// Window dragging.//-----------------------------------------------------------------------------function winMoveDragStart(event) { var target; var x, y; if (browser.isIE) target = window.event.srcElement.tagName; if (browser.isNS) target = event.target.tagName; if (target == "AREA") return; this.parentWindow.makeActive(); // Get cursor offset from window frame. if (browser.isIE) { x = window.event.x; y = window.event.y; } if (browser.isNS) { x = event.pageX; y = event.pageY; } winCtrl.xOffset = winCtrl.active.frame.offsetLeft - x; winCtrl.yOffset = winCtrl.active.frame.offsetTop - y; // Set document to capture mousemove and mouseup events. if (browser.isIE) { document.onmousemove = winMoveDragGo; document.onmouseup = winMoveDragStop; } if (browser.isNS) { document.addEventListener("mousemove", winMoveDragGo, true); document.addEventListener("mouseup", winMoveDragStop, true); event.preventDefault(); } winCtrl.inMoveDrag = true;}function winMoveDragGo(event) { var x, y; if (!winCtrl.inMoveDrag) return; // Get cursor position. if (browser.isIE) { x = window.event.x; y = window.event.y; window.event.cancelBubble = true; window.event.returnValue = false; } if (browser.isNS) { x = event.pageX; y = event.pageY; event.preventDefault(); } // Move window frame based on offset from cursor. winCtrl.active.frame.style.left = (x + winCtrl.xOffset) + "px"; winCtrl.active.frame.style.top = (y + winCtrl.yOffset) + "px";}function winMoveDragStop(event) { winCtrl.inMoveDrag = false; // Remove mousemove and mouseup event captures on document. if (browser.isIE) { document.onmousemove = null; document.onmouseup = null; } if (browser.isNS) { document.removeEventListener("mousemove", winMoveDragGo, true); document.removeEventListener("mouseup", winMoveDragStop, true); }}//-----------------------------------------------------------------------------// Window resizing.//-----------------------------------------------------------------------------function winResizeCursorSet(event) { var target; var xOff, yOff; if (this.parentWindow.isMinimized || winCtrl.inResizeDrag) return; // If not on window frame, restore cursor and exit. if (browser.isIE) target = window.event.srcElement; if (browser.isNS) target = event.target; if (target != this.parentWindow.frame) return; // Find resize direction. if (browser.isIE) { xOff = window.event.offsetX; yOff = window.event.offsetY; } if (browser.isNS) { xOff = event.layerX; yOff = event.layerY; } winCtrl.resizeDirection = "" if (yOff <= winCtrl.resizeCornerSize) winCtrl.resizeDirection += "n"; else if (yOff >= this.parentWindow.frame.offsetHeight - winCtrl.resizeCornerSize) winCtrl.resizeDirection += "s"; if (xOff <= winCtrl.resizeCornerSize) winCtrl.resizeDirection += "w"; else if (xOff >= this.parentWindow.frame.offsetWidth - winCtrl.resizeCornerSize) winCtrl.resizeDirection += "e"; // If not on window edge, restore cursor and exit. if (winCtrl.resizeDirection == "") { this.onmouseout(event); return; } // Change cursor. if (browser.isIE) document.body.style.cursor = winCtrl.resizeDirection + "-resize"; if (browser.isNS) this.parentWindow.frame.style.cursor = winCtrl.resizeDirection + "-resize";}function winResizeCursorRestore(event) { if (winCtrl.inResizeDrag) return; // Restore cursor. if (browser.isIE) document.body.style.cursor = ""; if (browser.isNS) this.parentWindow.frame.style.cursor = "";}function winResizeDragStart(event) { var target; // Make sure the event is on the window frame. if (browser.isIE) target = window.event.srcElement; if (browser.isNS) target = event.target; if (target != this.parentWindow.frame) return; this.parentWindow.makeActive(); if (this.parentWindow.isMinimized) return; // Save cursor position. if (browser.isIE) { winCtrl.xPosition = window.event.x; winCtrl.yPosition = window.event.y; } if (browser.isNS) { winCtrl.xPosition = event.pageX; winCtrl.yPosition = event.pageY; } // Save window frame position and current window size. winCtrl.oldLeft = parseInt(this.parentWindow.frame.style.left, 10); winCtrl.oldTop = parseInt(this.parentWindow.frame.style.top, 10); winCtrl.oldWidth = parseInt(this.parentWindow.frame.style.width, 10); winCtrl.oldHeight = parseInt(this.parentWindow.clientArea.style.height, 10); // Set document to capture mousemove and mouseup events. if (browser.isIE) { document.onmousemove = winResizeDragGo; document.onmouseup = winResizeDragStop; } if (browser.isNS) { document.addEventListener("mousemove", winResizeDragGo, true); document.addEventListener("mouseup" , winResizeDragStop, true); event.preventDefault(); } winCtrl.inResizeDrag = true;}function winResizeDragGo(event) { var north, south, east, west; var dx, dy; var w, h; if (!winCtrl.inResizeDrag) return; // Set direction flags based on original resize direction. north = false; south = false; east = false; west = false; if (winCtrl.resizeDirection.charAt(0) == "n") north = true; if (winCtrl.resizeDirection.charAt(0) == "s") south = true; if (winCtrl.resizeDirection.charAt(0) == "e" || winCtrl.resizeDirection.charAt(1) == "e") east = true; if (winCtrl.resizeDirection.charAt(0) == "w" || winCtrl.resizeDirection.charAt(1) == "w") west = true; // Find change in cursor position. if (browser.isIE) { dx = window.event.x - winCtrl.xPosition; dy = window.event.y - winCtrl.yPosition; } if (browser.isNS) { dx = event.pageX - winCtrl.xPosition; dy = event.pageY - winCtrl.yPosition; } // If resizing north or west, reverse corresponding amount. if (west) dx = -dx; if (north) dy = -dy; // Check new size. w = winCtrl.oldWidth + dx; h = winCtrl.oldHeight + dy; if (w <= winCtrl.active.minimumWidth) { w = winCtrl.active.minimumWidth; dx = w - winCtrl.oldWidth; } if (h <= winCtrl.active.minimumHeight) { h = winCtrl.active.minimumHeight; dy = h - winCtrl.oldHeight; } // Resize the window. For IE, keep client area and frame widths in synch. if (east || west) { winCtrl.active.frame.style.width = w + "px"; if (browser.isIE) winCtrl.active.clientArea.style.width = (w - winCtrl.active.widthDiff) + "px"; } if (north || south) winCtrl.active.clientArea.style.height = h + "px"; // Clip the title bar text, if necessary. if (east || west) { if (w < winCtrl.active.clipTextMinimumWidth) winCtrl.active.titleBarText.style.width = (winCtrl.minimizedTextWidth + w - winCtrl.active.minimumWidth) + "px"; else winCtrl.active.titleBarText.style.width = ""; } // For a north or west resize, move the window. if (west) winCtrl.active.frame.style.left = (winCtrl.oldLeft - dx) + "px"; if (north) winCtrl.active.frame.style.top = (winCtrl.oldTop - dy) + "px"; if (browser.isIE) { window.event.cancelBubble = true; window.event.returnValue = false; } if (browser.isNS) event.preventDefault();}function winResizeDragStop(event) { winCtrl.inResizeDrag = false; // Remove mousemove and mouseup event captures on document. if (browser.isIE) { document.onmousemove = null; document.onmouseup = null; } if (browser.isNS) { document.removeEventListener("mousemove", winResizeDragGo, true); document.removeEventListener("mouseup" , winResizeDragStop, true); }}//=============================================================================// Utility functions.//=============================================================================function winFindByClassName(el, className) { var i, tmp; if (el.className == className) return el; // Search for a descendant element assigned the given class. for (i = 0; i < el.childNodes.length; i++) { tmp = winFindByClassName(el.childNodes[i], className); if (tmp != null) return tmp; } return null;}//=============================================================================// Initialization code.//=============================================================================var winList = new Array();var winCtrl = new Object();function winInit() { var elList; // Initialize window control object. winCtrl.maxzIndex = 0; winCtrl.resizeCornerSize = 16; winCtrl.minimizedTextWidth = 100; winCtrl.inactiveFrameBackgroundColor = "#c0c0c0"; winCtrl.inactiveFrameBorderColor = "#f0f0f0 #505050 #404040 #e0e0e0"; winCtrl.inactiveTitleBarColor = "#808080"; winCtrl.inactiveTitleTextColor = "#c0c0c0"; winCtrl.inactiveClientAreaBorderColor = "#404040 #e0e0e0 #f0f0f0 #505050"; winCtrl.inactiveClientAreaScrollbarColor = ""; winCtrl.inMoveDrag = false; winCtrl.inResizeDrag = false; // Initialize windows and build list. elList = document.getElementsByTagName("DIV"); for (var i = 0; i < elList.length; i++) if (elList[i].className == "window") winList[elList[i].id] = new Window(elList[i]);}window.onload = winInit; // run initialization code after page loads.//]]>