function checkAll(theForm, cName, allNo_stat) {
var n=theForm.elements.length;
for (var i=0;i<n;i++){
if (theForm.elements[i].className.indexOf(cName) !=-1){
if (allNo_stat.checked) {
theForm.elements[i].checked = true;
} else {
theForm.elements[i].checked = false;
}
}
}
}