老师授课-3-倒计时之后点击
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 <style> 7 .bb 8 { 9 width:100px; height:40px; background-color:#0F3; border:5px double blue;} 10 11 </style> 12 </head> 13 <body> 14 <input type="button" value="同意（10）" id="bb" disabled="disabled" /> 15 </body> 16 </html> 17 <script> 18 var n =10; 19 var bb = document.getElementById("bb"); 20 function bian() 21 { 22 n--; 23 if(n==0) 24 { 25 bb.removeAttribute("disabled"); 26 bb.value="同意"; 27 } 28 else 29 { 30 bb.value="同意（"+n+"）"; 31 window.setTimeout("bian()",1000); 32 } 33 } 34 window.setTimeout("bian()",1000); 35 36 </script>
运行
