<body>
< input id="xg"type ="checkbox" name="fruit" value ="xg"> 西瓜</input><br/>
<input id="lz"type ="checkbox" name="fruit" value ="lz"> 栗子</input><br/>
<input id="pg"type ="checkbox" name="fruit" value ="pg"> 苹果</input><br/>
<input id="hmg"type ="checkbox" name="fruit" value ="hmg"> 哈密瓜</input><br/><br/>
<input type ="checked" onclick ="checked(this)">全部选择</input></body>
< script language ="javascript">
function checked(obj)
{
var fruits=document .getElementsByName ("fruit");
if(obj.checked)
{
for(var i=0;i<fruits.length ;i++)
fruits[i].checked=true ;
}
else
{
for(var i=0;i<fruits .length ;i++)
fruits [i].checked=false ;
}
}</script>
结果咋有错呢?
< input id="xg"type ="checkbox" name="fruit" value ="xg"> 西瓜</input><br/>
<input id="lz"type ="checkbox" name="fruit" value ="lz"> 栗子</input><br/>
<input id="pg"type ="checkbox" name="fruit" value ="pg"> 苹果</input><br/>
<input id="hmg"type ="checkbox" name="fruit" value ="hmg"> 哈密瓜</input><br/><br/>
<input type ="checked" onclick ="checked(this)">全部选择</input></body>
< script language ="javascript">
function checked(obj)
{
var fruits=document .getElementsByName ("fruit");
if(obj.checked)
{
for(var i=0;i<fruits.length ;i++)
fruits[i].checked=true ;
}
else
{
for(var i=0;i<fruits .length ;i++)
fruits [i].checked=false ;
}
}</script>
结果咋有错呢?
<input id="lz" type ="checkbox" name="fruit" value ="lz"> 栗子</input><br/>
<input id="pg" type ="checkbox" name="fruit" value ="pg"> 苹果</input><br/>
<input id="hmg" type ="checkbox" name="fruit" value ="hmg"> 哈密瓜</input><br/><br/>
<input type ="checkbox" onclick ="theforever(this)">全部选择</input>
<script>
function theforever(obj){
var fruits=document.getElementsByName("fruit");
if(obj.checked)
{
for(var i=0;i<fruits.length ;i++) fruits[i].checked=true ;
}
else
{
for(var i=0;i<fruits .length ;i++) fruits [i].checked=false ;
}
}
</script>