js簡單網速測試方法完整執行個體_javascript技巧

本文執行個體講述了js簡單網速測試方法。分享給大家供大家參考，具體如下：

運行效果截圖如下：

具體代碼如下：

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN""http://www.w3.org/TR/html4/loose.dtd"><html> <head> <title> New Document </title> <meta http-equiv="Content-Type" content="text/html; charset=gbk"/> <meta name="Generator" content="EditPlus"> <meta name="Author" content="xinmingyang"> <meta name="Keywords" content=""> <meta name="Description" content=""> </head> <body> <SCRIPT language=JavaScript>   var st = new Date();</SCRIPT><IMG alt="測試圖片" src="http://www.jb51.net/images/logo.gif" onload="showspeed();"><div id='showtxt'></div><script>  var arr=["網速低於50KB","網速在50-100KB之間","網速在100-200KB之間","網速在200-300KB之間","視頻通訊"];  function showspeed()   {     var filesize =35.4;  //measured in KB      var et = new Date();     var speed = Math.round(filesize*1000)/(et - st);    document.title=speed;    var scope=(speed>0 && speed<=50)?0:(speed>50 && speed<=100)?1:(speed>=100 && speed<200)?2:(speed>=200 && speed<300)?3:4;    alert(scope)    document.getElementById("showtxt").innerHTML = ("您的下載速度為：" + arr[scope] + " (K/秒)")   } </script> </body></html>

希望本文所述對大家JavaScript程式設計有所協助。