1 <body> 2 <form>你帅不帅？<input type="text" daan="不帅" id="t1" /> 3 <input type="button" value="检查答案" onclick="t()"/> 4 </form> 5 </body> 6 </html> 7 <script> 8 function t() 9 { 10 var a=document.getElementById("t1"); 11 var a2=a.value; 12 var a1=a.getAttribute("daan"); 13 if(a1==a2) 14 { 15 alert("还算有自知之明！");} 16 else 17 { 18 alert("你太自恋了！");} 19 } 20 </script>
原文：http://www.cnblogs.com/1116zsc/p/5331615.html