本文实例讲述了javascript实现可拖动变色并关闭层窗口的方法。分享给大家供大家参考。具体分析如下：
这是一款基于javascript+CSS实现层拖动的代码，不同的是它在拖动的时候窗口会变色，使操作体验更好一些，你可以运行代码查看效果。它还可以显示/隐藏或关闭打开的效果，没事的时候推敲一下
<html> <head> <title>拖动窗口</title> <meta http-equiv="Content-Type" content="text/html; charset=utf-8"> <style type='text/css'> <!-- body{font-size:12px;} a:visited{text-decoration:none;color:slategray;} a:hover{text-decoration:underline;color:slategray;} a:link{text-decoration:none;color:slategray;} --> </style> <script language=JScript> <!-- var x0=0,y0=0,x1=0,y1=0; var offx=6,offy=6; var moveable=false; var hover='orange',normal='#336699';//color; var index=10000;//z-index; //开始拖动; function startDrag(obj) { if(event.button==1) { //锁定标题栏; obj.setCapture(); //定义对象; var win = obj.parentNode; var sha = win.nextSibling; //记录鼠标和层位置; x0 = event.clientX; y0 = event.clientY; x1 = parseInt(win.style.left); y1 = parseInt(win.style.top); //记录颜色; normal = obj.style.backgroundColor; //改变风格; obj.style.backgroundColor = hover; win.style.borderColor = hover; obj.nextSibling.style.color = hover; sha.style.left = x1 + offx; sha.style.top = y1 + offy; moveable = true; } } //拖动; function drag(obj) { if(moveable) { var win = obj.parentNode; var sha = win.nextSibling; win.style.left = x1 + event.clientX - x0; win.style.top = y1 + event.clientY - y0; sha.style.left = parseInt(win.style.left) + offx; sha.style.top = parseInt(win.style.top) + offy; } } //停止拖动; function stopDrag(obj) { if(moveable) { var win = obj.parentNode; var sha = win.nextSibling; var msg = obj.nextSibling; win.style.borderColor = normal; obj.style.backgroundColor = normal; msg.style.color = normal; sha.style.left = obj.parentNode.style.left; sha.style.top = obj.parentNode.style.top; obj.releaseCapture(); moveable = false; } } //获得焦点; function getFocus(obj) { if(obj.style.zIndex!=index) { index = index + 2; var idx = index; obj.style.zIndex=idx; obj.nextSibling.style.zIndex=idx-1; } } //最小化; function min(obj) { var win = obj.parentNode.parentNode; var sha = win.nextSibling; var tit = obj.parentNode; var msg = tit.nextSibling; var flg = msg.style.display=="none"; if(flg) { win.style.height = parseInt(msg.style.height) + parseInt(tit.style.height) + 2*2; sha.style.height = win.style.height; msg.style.display = "block"; obj.innerHTML = "0"; } else { win.style.height = parseInt(tit.style.height) + 2*2; sha.style.height = win.style.height; obj.innerHTML = "2"; msg.style.display = "none"; } } //创建一个对象; function xWin(id,w,h,l,t,tit,msg) { index = index+2; this.id = id; this.width = w; this.height = h; this.left = l; this.top = t; this.zIndex = index; this.title = tit; this.message = msg; this.obj = null; this.bulid = bulid; this.bulid(); } //初始化; function bulid() { var str = "" + "<div id=xMsg" + this.id + " " + "style='" + "z-index:" + this.zIndex + ";" + "width:" + this.width + ";" + "height:" + this.height + ";" + "left:" + this.left + ";" + "top:" + this.top + ";" + "background-color:" + normal + ";" + "color:" + normal + ";" + "font-size:8pt;" + "font-family:Tahoma;" + "position:absolute;" + "cursor:default;" + "border:2px solid " + normal + ";" + "' " + "onmousedown='getFocus(this)'>" + "<div " + "style='" + "background-color:" + normal + ";" + "width:" + (this.width-2*2) + ";" + "height:20;" + "color:white;" + "' " + "onmousedown='startDrag(this)' " + "onmouseup='stopDrag(this)' " + "onmousemove='drag(this)' " + "ondblclick='min(this.childNodes[1])'" + ">" + "<span + (this.width-2*12-4) + ";padding-left:3px;'>" + this.title + "</span>" + "<span onclick='min(this)'>0</span>" + "<span onclick='ShowHide(""+this.id+"",null)'>r</span>" + "</div>" + "<div + "width:100%;" + "height:" + (this.height-20-4) + ";" + "background-color:white;" + "line-height:14px;" + "word-break:break-all;" + "padding:3px;" + "'>" + this.message + "</div>" + "</div>" + "<div id=xMsg" + this.id + "bg + "width:" + this.width + ";" + "height:" + this.height + ";" + "top:" + this.top + ";" + "left:" + this.left + ";" + "z-index:" + (this.zIndex-1) + ";" + "position:absolute;" + "background-color:black;" + "filter:alpha(opacity=40);" + "'></div>"; document.body.insertAdjacentHTML("beforeEnd",str); } //显示隐藏窗口 function ShowHide(id,dis){ var bdisplay = (dis==null)?((document.getElementById("xMsg"+id).style.display=="")"):dis document.getElementById("xMsg"+id).style.display = bdisplay; document.getElementById("xMsg"+id+"bg").style.display = bdisplay; } //--> </script> <script language='JScript'> <!-- function initialize() { var a = new xWin("1",160,200,200,200,"窗口1","xWin Demo"); var b = new xWin("2",240,200,100,100,"窗口2","Welcome"); var c = new xWin("3",200,160,250,50,"窗口3","Copyright"); ShowHide("1","none");//隐藏窗口1 } window.onload = initialize; //--> </script> </head> <base target="_blank"> <body onselectstart='return false' oncontextmenu='return false' > <a href="">Windows 1</a> <a href="">Windows 2</a> <a href="">Windows 3</a> </body> </html>
希望本文所述对大家的javascript程序设计有所帮助。
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