本文實例講述了javascript實現可拖動變色並關閉層窗口的方法。分享給大家供大家參考。具體分析如下：
這是一款基於javascript+CSS實現層拖動的代碼，不同的是它在拖動的時候窗口會變色，使操作體驗更好一些，你可以運行代碼查看效果。它還可以顯示/隱藏或關閉打開的效果，沒事的時候推敲一下
?
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 <html> <head> <title>拖動窗口</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; //開始拖動; function startDrag(obj) { if(event.button==1) { //鎖定標題欄; obj.setCapture(); //定義對象; var win = obj.parentNode; var sha = win.nextSibling; //記錄鼠標和層位置; x0 = event.clientX; y0 = event.clientY; x1 = parseInt(win.style.left); y1 = parseInt(win.style.top); //記錄顏色; normal = obj.style.backgroundColor; //改變風格; 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; } } //拖動; 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; } } //停止拖動; 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; } } //獲得焦點; 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"; } } //創建一個對象; 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 style='width:" + (this.width-2*12-4) + ";padding-left:3px;'>" + this.title + "</span>" + "<span style='width:12;border-width:0px;color:white;font-family:webdings;' onclick='min(this)'>0</span>" + "<span style='width:12;border-width:0px;color:white;font-family:webdings;' onclick='ShowHide(""+this.id+"",null)'>r</span>" + "</div>" + "<div style='" + "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 style='" + "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); } //顯示隱藏窗口 function ShowHide(id,dis){ var bdisplay = (dis==null)?((document.getElementById("xMsg"+id).style.display=="")?"none":""):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");//隱藏窗口1 } window.onload = initialize; //--> </script> </head> <base target="_blank"> <body onselectstart='return false' oncontextmenu='return false' > <a onclick="ShowHide('1',null);return false;" href="">Windows 1</a> <a onclick="ShowHide('2',null);return false;" href="">Windows 2</a> <a onclick="ShowHide('3',null);return false;" href="">Windows 3</a> </body> </html>希望本文所述對大家的javascript程序設計有所幫助。