var inputs = document.all.tags("INPUT");
var checks = new Array();
var j;
for (var i=0; i < inputs.length; i++)
{
if (inputs[i].type == "checkbox")
{
j = checks.length++;
checks[j] = inputs[i];
}
}alert(checks.length);
var checks = new Array();
var j;
for (var i=0; i < inputs.length; i++)
{
if (inputs[i].type == "checkbox")
{
j = checks.length++;
checks[j] = inputs[i];
}
}alert(checks.length);
var bb = new Array(); var j;
for (var i=0; i < aa.length; i++){
if (aa[i].type == "checkbox"){
j = bb.length++;
bb[j] = aa[i];
}
}
alert("网页里所有的checkbox个数为:"+bb.length);