Implementing all-select/no-select checkbox switching_form special effects

Switching between selecting all and not selecting all




ps: (Of course, if the select all box is another control such as a button, or a link, then check The checkItem click event in the box can be removed to avoid errors) <script> <BR>function checkAll(e, itemName) <BR>{ <BR> var aa = document.getElementsByName(itemName); <BR> for (var i=0; i<aa.length; i++) <BR> aa[i].checked = e.checked; <BR>} <BR>function checkItem(e, allName) <BR>{ <BR> var all = document.getElementsByName(allName)[0]; <BR> if(!e.checked) all.checked = false; <BR> else <BR> { <BR> var aa = document.getElementsByName(e.name); <BR> for (var i=0; i<aa.length; i++) <BR> if(!aa[i].checked) return; <BR> all.checked = true; <BR> } <BR>} <BR></script>