34、复选框全选、全不选和反选的效果实现

34、复选框全选、全不选和反选的效果实现

<html>

 

<head>

<meta http-equiv="Content-Type" content="text/html; charset=gb2312">

<title>网页特效代码--复选框全选、全不选和反选的效果实现</title>

<SCRIPT LANGUAGE="JavaScript">

 

<!-- Begin

function checkAll() {

for (var j = 1; j <= 9; j++) {

box = eval("document.checkboxform.C" + j);

if (box.checked == false) box.checked = true;

   }

}

 

function uncheckAll() {

for (var j = 1; j <= 9; j++) {

box = eval("document.checkboxform.C" + j);

if (box.checked == true) box.checked = false;

   }

}

 

function switchAll() {

for (var j = 1; j <= 9; j++) {

box = eval("document.checkboxform.C" + j);

box.checked = !box.checked;

   }

}

//  End -->

</script>

</head>

 

<body>

 

<form name=checkboxform>

<input type=checkbox name=C1 checked>C1<br>

<input type=checkbox name=C2 checked>C2<br>

<input type=checkbox name=C3 checked>C3<br>

<input type=checkbox name=C4 checked>C4<br>

<input type=checkbox name=C5 checked>C5<br>

<input type=checkbox name=C6 checked>C6<br>

<input type=checkbox name=C7 checked>C7<br>

<input type=checkbox name=C8 checked>C8<br>

<input type=checkbox name=C9 checked>C9<br>

<br>

<input type=button value="全部选中" onClick="checkAll()"><br>

<input type=button value="全部不选" onClick="uncheckAll()"><br>

<input type=button value="选择转换" onClick="switchAll()"><br>

</form>

 

</body>

 

</html>

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