本文实例讲述了JS实现鼠标框选效果的方法。分享给大家供大家参考，具体如下：
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd"> <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8"> <title>鼠标框选效果</title> <style> *{ padding:0; margin:0; } #bottom{ position:absolute; bottom:0px; width:100%; height:40px; border:1px solid #000; background:#000; color:#fff; } .tempDiv{ border:1px dashed blue; background:#5a72f8; position:absolute; width:0; height:0; filter:alpha(opacity:10); opacity:0.1 } </style> <script type = "text/javascript"> window.onload = function(){ var stateBar = document.getElementById("bottom"); document.onmousedown = function(e){ var posx = e.clientX; var posy = e.clientY; var div = document.createElement("div"); div.className = "tempDiv"; div.style.left = e.clientX+"px"; div.style.top = e.clientY+"px"; document.body.appendChild(div); document.onmousemove = function(ev){ div.style.left = Math.min(ev.clientX, posx) + "px"; div.style.top = Math.min(ev.clientY, posy) + "px"; div.style.width = Math.abs(posx - ev.clientX)+"px"; div.style.height = Math.abs(posy - ev.clientY)+"px"; stateBar.innerHTML = "MouseX: " + ev.clientX + "<br/>MouseY: " + ev.clientY; document.onmouseup = function(){ div.parentNode.removeChild(div); document.onmousemove = null; document.onmouseup = null; } } } } </script> </head> <body> <div id = "bottom"></div> </body> </html>
希望本文所述对大家JavaScript程序设计有所帮助。
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