javascript实现复选框全选和反选

//全选

function chooseAll()
{
var selects = document.getElementsByName('ids');
for(var j=0;j<selects.length;j++)
{
selects[j].checked=true;
}
}

//反选
function fanselect()
{
var selects = document.getElementsByName('ids');
for(var j=0;j<selects.length;j++)
{

if(selects[j].checked==true)
{
selects[j].checked=false;
}else
{
selects[j].checked=true;
}
}
}