function onDocumentLoad(document){
	onLoadAdd(document);
}

function onLoadAdd(document){
	for(var i = 0; i < document.forms.length; i++){
		if(document.forms[i].className == 'service_form'){
			addUpFormFields(document.forms[i]);
		}		
		
	}	
}

function addUpFormFields(form){
	sum = 0;
	for(var i = 0; i < form.elements.length; i++){
		if(form.elements[i].name != 'total' && form.elements[i].checked){
			sum += parseInt(form.elements[i].value);
		}
	}
	form.elements['total'].value = sum;
	
}