<!DOCTYPE HTML><html> <head> <meta http-equiv="Content-Type" content="text/html; charset=gb2312"> <title>滑鼠長按</title> </head> <body> <input type="button" onmousedown="holdDown()" onmouseup="holdUp()" value="滑鼠長按"/> <script type="text/javascript"> var timeStart,timeEnd,time;//申明全域變數 function getTimeNow()//擷取此刻時間 { var now=new Date(); return now.getTime(); } function holdDown()//滑鼠按下時觸發 { timeStart=getTimeNow();//擷取滑鼠按下時的時間 time=setInterval(function()//setInterval會每100毫秒執行一次 { timeEnd=getTimeNow();//也就是每100毫秒擷取一次時間 if(timeEnd-timeStart>1000)//如果此時檢測到的時間與第一次擷取的時間差有1000毫秒 { clearInterval(time);//便不再繼續重複此函數 （clearInterval取消周期性執行） alert("長按");//並彈出代碼 } },100); } function holdUp() { clearInterval(time);//如果按下時間不到1000毫秒便彈起， } </script> </body></html>
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