本文實例講述了JS實現鼠標框選效果的方法。分享給大家供大家參考，具體如下：
<!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>鼠標框選效果</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>更多關於JavaScript相關內容感興趣的讀者可查看本站專題：《JavaScript切換特效與技巧總結》、《JavaScript查找算法技巧總結》、《JavaScript動畫特效與技巧匯總》、《JavaScript錯誤與調試技巧總結》、《JavaScript數據結構與算法技巧總結》、《JavaScript遍曆算法與技巧總結》及《JavaScript數學運算用法總結》
希望本文所述對大家JavaScript程序設計有所幫助。