function get_order_form_obj(){
	return document.forms[0];
}

function modify_form(form) {
	var first_checked, i;
	first_checked = -1;
	// find the first checked product with reduced price
	for(i = 0; i < form.length; i++)
 		if(document.getElementById('price' + form[i].value) && form[i].checked && first_checked == -1){
			first_checked = form[i].value;
			break;
		}

	for(i = 0; i < form.length; i++){
		var price = document.getElementById('price' + form[i].value);
		if(price){
			var rprice = document.getElementById('rprice' + form[i].value);
			if(first_checked != -1 && form[i].value != first_checked){ 
				price.className = 'altprice';
				rprice.className = 'price';
			} else{
				price.className = 'price';
				rprice.className = 'altprice';
			}
		}
	}
}

function clicked_checkbox(object) {
	modify_form(object.form);
}

var prev_onload_8f8930fjs = window.onload; 

function page_onload(){
	if(prev_onload_8f8930fjs)
		prev_onload_8f8930fjs();
	modify_form(get_order_form_obj());		
}

window.onload = page_onload;