function checkAll()
{
var tempCheck = document.getElementById("idall").checked;
var eles = document.getElementsByTagName("input");
for(var i=0;i<eles.length;i++)
{
if(eles[i].type=="checkbox")
eles[i].checked=tempCheck;
}
}
文章來源:http://www.cnblogs.com/wangdetian168/archive/2008/09/06/1285690.html