<html>
<head>
<title>练习1.2</title>
<script language="JavaScript">
function SelectAll()
{
oEl = event.srcElement; //获取当前单击的元素
for(j = 0;j < document.all.length; j++)
{ // 遍历所有的checkboxif(document.all(j).id.indexOf("Checkbox") != -1)//有这个id号
{if(oEl.checked)
//如果选择了全选
document.all(j).checked = true; //全选
else
document.all(j).checked = false; //全不选
}
}
}
function checkAll() {
for (var j = 1; j <= 4; j++) {
box = eval("document.form.item" + j);
if (box.checked == false) box.checked = true;//checked表示选没选中
}
}
function uncheckAll() {
for (var j = 1; j <= 4; j++) {
box = eval("document.form.item" + j);
if (box.checked == true) box.checked = false;
}
}
function switchAll() {
for (var j = 1; j <= 4; j++) {
box = eval("document.form.item" + j);
box.checked = !box.checked;
}
}
function SelectAll()
{
for (var j=1;j<=4;j++)
{box=eval("document.form.item"+j);
if(box.checked==false)box.checked=ture;
else
box.checked=false;}
}
</script>
</head>
<body>
请选择您的爱好!<p>
<form name=form>
<input id="Checkbox5" type="checkbox" onclick="SelectAll()"name=item5/>全选或全不选
<p>
<input id="Checkbox1" type="checkbox" name="item1" />足球
<input id="Checkbox2" type="checkbox"name="item2"/>篮球
<input id="Checkbox3" type="checkbox"name="item3" />游泳
<input id="Checkbox4" type="checkbox" name="item4" />唱歌<p>
<input type=button value="全选" onClick="checkAll()">
<input type=button value="全不选" onClick="uncheckAll()">
<input type=button value="反选" onClick="switchAll()">
</form>
</body>
</html>这个程序,全选/全不选总出不来。好纠结啊
<head>
<title>练习1.2</title>
<script language="JavaScript">
function SelectAll()
{
oEl = event.srcElement; //获取当前单击的元素
for(j = 0;j < document.all.length; j++)
{ // 遍历所有的checkboxif(document.all(j).id.indexOf("Checkbox") != -1)//有这个id号
{if(oEl.checked)
//如果选择了全选
document.all(j).checked = true; //全选
else
document.all(j).checked = false; //全不选
}
}
}
function checkAll() {
for (var j = 1; j <= 4; j++) {
box = eval("document.form.item" + j);
if (box.checked == false) box.checked = true;//checked表示选没选中
}
}
function uncheckAll() {
for (var j = 1; j <= 4; j++) {
box = eval("document.form.item" + j);
if (box.checked == true) box.checked = false;
}
}
function switchAll() {
for (var j = 1; j <= 4; j++) {
box = eval("document.form.item" + j);
box.checked = !box.checked;
}
}
function SelectAll()
{
for (var j=1;j<=4;j++)
{box=eval("document.form.item"+j);
if(box.checked==false)box.checked=ture;
else
box.checked=false;}
}
</script>
</head>
<body>
请选择您的爱好!<p>
<form name=form>
<input id="Checkbox5" type="checkbox" onclick="SelectAll()"name=item5/>全选或全不选
<p>
<input id="Checkbox1" type="checkbox" name="item1" />足球
<input id="Checkbox2" type="checkbox"name="item2"/>篮球
<input id="Checkbox3" type="checkbox"name="item3" />游泳
<input id="Checkbox4" type="checkbox" name="item4" />唱歌<p>
<input type=button value="全选" onClick="checkAll()">
<input type=button value="全不选" onClick="uncheckAll()">
<input type=button value="反选" onClick="switchAll()">
</form>
</body>
</html>这个程序,全选/全不选总出不来。好纠结啊
楼主发表于:2012-03-04 09:48:19
<html>
<head>
<title>练习1.2</title>
<script language="JavaScript">
function SelectAll(evt)
{
e = window.event?window.event.srcElement:evt.target;
s = document.getElementsByName("item")
for(j = 0;j < s.length; j++)
{
s[j].checked = e.checked;
}
}function checkAll() {
s = document.getElementsByName("item")
for(j = 0;j < s.length; j++)
{
s[j].checked = true;
}
}
function uncheckAll() {
s = document.getElementsByName("item")
for(j = 0;j < s.length; j++)
{
s[j].checked = false;
}
}function switchAll() {
s = document.getElementsByName("item")
for(j = 0;j < s.length; j++)
{
s[j].checked = !s[j].checked;
}
}</script>
</head>
<body>
请选择您的爱好!<p>
<form name=form>
<input type="checkbox" onclick="SelectAll(event)" />全选或全不选
<p>
<input type="checkbox" name="item" />足球
<input type="checkbox" name="item" />篮球
<input type="checkbox" name="item" />游泳
<input type="checkbox" name="item" />唱歌<p>
<input type=button value="全选" onClick="checkAll()">
<input type=button value="全不选" onClick="uncheckAll()">
<input type=button value="反选" onClick="switchAll()">
</form>
</body>
</html>