標籤：text set w3c ansi www round nal i++ var
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"><html><head><meta http-equiv="Content-Type" content="text/html; charset=utf-8"><title>操作css樣式【js】</title><script type="text/javascript"> function createCode(){ var datas = ["請", "叫", "我", "木", "丁", "西", "隨", "機", "碼"]; // var randomNum = Math.floor(Math.random()*(7-2+1) + 2);//2-7隨機數（包括邊界） // var randomNum = Math.floor(Math.random()*(4-2) + 2);//2-3(包括邊界) // var randomNum = Math.random()*2 + 2;//2點幾到3點幾(不包括邊界2、4) var randomNum = Math.round((Math.random()*(7-2) + 2)*10)/10;//2點幾到7(最多保留一位小數) alert(randomNum); //產生4個隨機數 /* for(var i=0; i<4; i++){ var randomIndex = Math.floor(Math.random()*datas.length);//0-8隨機數（包括）；Math.random(); 0-1（不包括邊界）；Math.floor()向下取整 //alert(randomIndex); }*/ }</script></head><body> <a href="#" onclick="createCode()">看不清，再來一個</a></body></html>
操作css樣式【js】
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