利用js实现遮罩以及弹出可移动登录窗口
代码如下:
<!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> <title></title> <script type="text/javascript"> function showLogin() { var loginDiv = document.getElementById("loginDiv"); var zhezhao = document.getElementById("zhezhao"); var clientx = document.documentElement.clientWidth; var clienty = document.documentElement.clientHeight; var l_margin = (clientx - parseInt(loginDiv.style.width)) / 2; var t_margin = (clienty - parseInt(loginDiv.style.height)-200) / 2 loginDiv.style.left = l_margin + "px"; loginDiv.style.top = t_margin +"px"; loginDiv.style.display = "block"; zhezhao.style.display = "block"; } function hidLogin() { var loginDiv = document.getElementById("loginDiv"); var zhezhao = document.getElementById("zhezhao"); loginDiv.style.display = "none"; zhezhao.style.display = "none"; } function titleMove() { var moveable = true; var loginDiv = document.getElementById("loginDiv"); //以下变量提前设置好 var clientX = window.event.clientX; var clientY = window.event.clientY; var moveTop = parseInt(loginDiv.style.top); var moveLeft = parseInt(loginDiv.style.left); document.onmousemove = function MouseMove() { if (moveable) { var y = moveTop + window.event.clientY - clientY; var x = moveLeft + window.event.clientX - clientX; if (x > 0 && y > 0) { loginDiv.style.top = y + "px"; loginDiv.style.left = x + "px"; } } } document.onmouseup = function Mouseup() { moveable = false; } } </script></head><body><!--Main start z-index:0--><div id="Main" style="position:absolute;z-index:0;"><a href="javascript:showLogin()">登陆</a></div><!--Main start z-index:0--><!--loginDiv start :z-index:2--><div id="loginDiv" style="background-color:white;width:300px;height:150px;border:1px solid blue;z-index:2;display:none;position:absolute;border-top:none"> <div onmousedown="titleMove()" id="login_title" style="width:300px;height:25px;background-color:Blue;border:1px solid silver;border-left:none;border-right:none"> <!--<img src="../images/close.jpg" style="float:right" onclick="hidLogin()"/>--> <a href="javascript:hidLogin()" style="float:right;text-decoration:none;color:white;margin-right:2px;font-size:20px">×</a> </div> <table style="clear:right;width:298px;height:115px;text-align:right;margin-top:10px;"> <tr><td>用户名：</td><td><input type="text" style="width:180px;" /></td><td></td></tr> <tr><td>密码:</td><td><input type="text" style="width:180px;" /></td><td></td></tr> <tr><td><br /></td><td></td></tr> </table></div><!--loginDiv end :z-index:2--><!--zhezhao start: z-index:1--><div id="zhezhao" style="position:absolute;z-index:1;width:100%;height:100%;background-color:silver;display:none;opacity:.5;"><!--zhezhao end--></div></body></html>
【效果】