日期:2014-05-16 浏览次数:20355 次
<!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>Insert title here</title> <script type="text/javascript"> function cal(obj){ var num = parseFloat(obj.value); var valueInt = Math.round(num*10)/10; //toFixed(2)表示精确到小数点后2位 document.getElementById("t1").value = valueInt.toFixed(2); } </script> </head> <body> <input type="text" onchange="cal(this)"></input> <input id="t1" type="text"></input> </body> </html>