var price = new Array();

price['field[4]_1']=3000;price['field[4]_2']=4000;
var inputs;
var zhil_sum;

function zhil_prepare()
{
	var zhil_form = document.getElementById("zhil_form");
	inputs = zhil_form.getElementsByTagName("input");
	zhil_sum = document.getElementById("zhil_sum");
	
	for(var i=0;i<inputs.length;i++)
	{
		if
		(
			(inputs[i].name.substring(0,5).toLowerCase()=="field") && 
			(inputs[i].type.toLowerCase()=="radio" || inputs[i].type.toLowerCase()=="checkbox")
		)
			inputs[i].onclick = zhil_calc;
	}
	zhil_calc();
}

function zhil_calc()
{
	var s = 0;
	for(var i=0;i<inputs.length;i++)
	{
		if
		(
			(inputs[i].name.substring(0,5).toLowerCase()=="field") && 
			(inputs[i].type.toLowerCase()=="radio" || inputs[i].type.toLowerCase()=="checkbox")&&
			inputs[i].checked
		)
			s += price[inputs[i].name.toLowerCase()+"_"+inputs[i].value];
	}
	zhil_sum.value = s;
}