function checkBoxSelected(inputName){
	var boxes = document.getElementsByName(inputName);
	if(boxes){
		for(var i = 0; i < boxes.length; i++){
			if(boxes[i].checked){
				return true;
			}
		}
	}
	return false;
}

function checkBoxSelectedNum(inputName){
	var boxes = document.getElementsByName(inputName);
	var num = 0;
	var boxvalue ;
	if(boxes){
		for(var i = 0; i < boxes.length; i++){
			if(boxes[i].checked){
				num++;
				if (num>1) {
					return false;
				}else{
					boxvalue = boxes[i].value;
				}
			}
		}
	}
	if (num==1){
		return boxvalue;
	}else{
		return false;
	}
}

function checkAll(inputName, isChecked){
	var boxes = document.getElementsByName(inputName);
	if(boxes){
		for(var i = 0; i < boxes.length; i++){
			if(boxes[i].disabled){
				continue;
			}
			boxes[i].checked = isChecked ? true : false;
		}
	}
}