HTML代码：
1 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> 2 <html xmlns="http://www.w3.org/1999/xhtml"> 3 <head> 4 <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> 5 <title>无标题文档</title> 6 </head> 7 8 <body> 9 <form>中华民国成立于哪一年<input type="text" daan="1912" value="" id="t1" name="t1" /> 10 <input type="button" onclick="check()" id="t2" name="t2" value="检查答案" /> 11 </form> 12 </body> 13 </html> 14 <script> 15 function check() 16 { 17 var a=document.getElementById("t1"); 18 var a1=a.value; 19 var a2=a.getAttribute("daan"); 20 if(a1==a2) 21 { 22 alert("恭喜你答对了"); 23 } 24 else 25 {alert("笨蛋")} 26 } 27 </script>
效果为：
