要做出一個浮動視窗很簡單,但要加上判斷現在邊界在哪邊來因應相對位置就要下點功夫了,除了要抓出目前點選物件跟視窗的相對位置,還要加上對卷軸距離的判斷,否則就會出現像下圖的情況。
<!DOCTYPE HTML> <html> <head> <meta charset=utf-8"> <title>Cursor</title> <style type="text/css" media="screen"> #floatdiv { position: absolute; top: 0; left: 0; border: 1px solid; width: 200px; height: 50px; display: none; background: #FFFF00; z-index: 100; } </style> <script type="text/javascript" src="http://code.jquery.com/jquery-1.6.2.min.js"></script> <script type="text/javascript"> $(function() { var $div = $('#floatdiv'); $('[name="btn"]').click(function(e) { var $wH = $(window).height(), $sT = $(window).scrollTop(), $pT = $(this).position().top, $dH = $div.height(), $eY = e.pageY, $wW = $(window).width(), $sL = $(window).scrollLeft(), $pL = $(this).position().left, $dW = $div.width(), $eX = e.pageX; $top = ($wH-$pT+$sT < $dH) ? ($eY-$dH) : $eY; $left = ($wW-$pL+$sL < $dW) ? ($eX-$dW) : $eX; $div .css({left: $left, top: $top}) .show(); return false; }); $div.click(function(e) { // 點擊 div 本身不觸動消失 e.stopPropagation(); }); $(document).click(function() { // 點擊任一物件使 div 消失 $div.hide(); }); }); </script> </head> <body> <div id="floatdiv"></div> <a href="#" name="btn">click me</a> </body> </html>
非常實用!
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