iframe模拟html页面弹出框

来源：互联网发布：centos gcc使用编辑：程序博客网时间：2024/05/25 23:26
1.弹出框的解释：
实际上所有的所谓的html弹出框都是在iframe里面重新指定了一个url而已，并不是浏览器本身提供的弹出框，但是它本身已经达到了弹出框的效果。
2.示例如下：
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><html xmlns="http://www.w3.org/1999/xhtml"><head>    <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />    <title>无标题文档</title>    <script language="javascript">        function alertWin(title, msg, w, h){            var titleheight = "22px"; // 提示窗口标题高度            var bordercolor = "#666699"; // 提示窗口的边框颜色            var titlecolor = "#FFFFFF"; // 提示窗口的标题颜色            var titlebgcolor = "#666699"; // 提示窗口的标题背景色            var bgcolor = "#FFFFFF"; // 提示内容的背景色            var iWidth = document.documentElement.clientWidth;            var iHeight = document.documentElement.clientHeight;            var bgObj = document.createElement("div");            bgObj.style.cssText = "position:absolute;left:0px;top:0px;width:"+iWidth+"px;height:"+Math.max(document.body.clientHeight, iHeight)+"px;filter:Alpha(Opacity=30);opacity:0.3;background-color:#000000;z-index:101;";            document.body.appendChild(bgObj);            var msgObj=document.createElement("div");            msgObj.style.cssText = "position:absolute;font:11px '宋体';top:"+(iHeight-h)/2+"px;left:"+(iWidth-w)/2+"px;width:"+w+"px;height:"+h+"px;text-align:center;border:1px solid "+bordercolor+";background-color:"+bgcolor+";padding:1px;line-height:22px;z-index:102;";            document.body.appendChild(msgObj);            var table = document.createElement("table");            msgObj.appendChild(table);            table.style.cssText = "margin:0px;border:0px;padding:0px;";            table.cellSpacing = 0;            var tr = table.insertRow(-1);            var titleBar = tr.insertCell(-1);            titleBar.style.cssText = "width:100%;height:"+titleheight+"px;text-align:left;padding:3px;margin:0px;font:bold 13px '宋体';color:"+titlecolor+";border:1px solid " + bordercolor + ";cursor:move;background-color:" + titlebgcolor;            titleBar.style.paddingLeft = "10px";            titleBar.innerHTML = title;            var moveX = 0;            var moveY = 0;            var moveTop = 0;            var moveLeft = 0;            var moveable = false;            var docMouseMoveEvent = document.onmousemove;            var docMouseUpEvent = document.onmouseup;            titleBar.onmousedown = function() {                var evt = getEvent();                moveable = true;                moveX = evt.clientX;                moveY = evt.clientY;                moveTop = parseInt(msgObj.style.top);                moveLeft = parseInt(msgObj.style.left);                document.onmousemove = function() {                    if (moveable) {                        var evt = getEvent();                        var x = moveLeft + evt.clientX - moveX;                        var y = moveTop + evt.clientY - moveY;                        if ( x > 0 &&( x + w < iWidth) && y > 0 && (y + h < iHeight) ) {                            msgObj.style.left = x + "px";                            msgObj.style.top = y + "px";                        }                    }                };                document.onmouseup = function () {                    if (moveable) {                        document.onmousemove = docMouseMoveEvent;                        document.onmouseup = docMouseUpEvent;                        moveable = false;                        moveX = 0;                        moveY = 0;                        moveTop = 0;                        moveLeft = 0;                    }                };            }            var closeBtn = tr.insertCell(-1);            closeBtn.style.cssText = "cursor:pointer; padding:2px;background-color:" + titlebgcolor;            closeBtn.innerHTML = "<span style='font-size:15pt; color:"+titlecolor+";'>×</span>";            closeBtn.onclick = function(){                document.body.removeChild(bgObj);                document.body.removeChild(msgObj);            }            var msgBox = table.insertRow(-1).insertCell(-1);            msgBox.style.cssText = "font:10pt '宋体';";            msgBox.colSpan  = 2;            msgBox.innerHTML = msg;            // 获得事件Event对象，用于兼容IE和FireFox            function getEvent() {                return window.event || arguments.callee.caller.arguments[0];            }        }    </script></head><body><input type="button" value="点这里" onclick="alertWin('标题','这里是内容',300,200);" /></body></html>