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 <title> new document </title> 5 <meta name="generator" content="editplus" /> 6 <meta name="author" content="" /> 7 <meta name="keywords" content="" /> 8 <meta name="description" content="" /> 9 <script type="text/javascript"> 10 function test(sta){ 11 var chk = document.getElementsByTagName(‘input‘); 12 for (var i=0;i<7 ;i++ ){ 13 chk[i].checked= sta; 14 15 } 16 } 17 </script> 18 </head> 19 20 <body> 21 <input type="checkbox" value="" /><br/> 22 <input type="checkbox" value="" /><br/> 23 <input type="checkbox" value="" /><br/> 24 <input type="checkbox" value="" /><br/> 25 <input type="checkbox" value="" /><br/> 26 <input type="checkbox" value="" /><br/> 27 <input type="checkbox" value="" /><br/> 28 29 <input type="button" value="全选"onclick="test(‘checked‘);"> 30 <input type="button" value="全不选"onclick="test(‘‘);"> 31 </body> 32 </html>
原文：http://www.cnblogs.com/a2762/p/4107705.html