function ToggleAll(e)
{
if (e.checked) {
    CheckAll();
}
else {
    ClearAll();
}
}

function CheckAll()
{
var ml = document.styles;
var len = ml.elements.length;
for (var i = 0; i < len; i++) {
    var e = ml.elements[i];
e.checked = true;
}
ml.toggleDel.checked = true;
}

function ClearAll()
{
var ml = document.styles;
var len = ml.elements.length;
for (var i = 0; i < len; i++) {
    var e = ml.elements[i];
e.checked = false;
}
}