Question

怎样用JS实现CHECKBOX 为全选

Answer 1

<script>
var s = 1;
function jisuan(){
var m = document.getElementsByTagName("input");

for(var i=1; i<m.length; i++){
if(m[i].type=="checkbox" && s%2==1){
m[i].checked = true;
}else{
m[i].checked = false;
}
}
s++;
}
</script>

<input type="checkbox" onclick="jisuan();" /><br />
<input type="checkbox" />
<input type="checkbox" />
<input type="checkbox" />
<input type="checkbox" />
<input type="checkbox" />