var temp1 = 0;
var temp2 = 0;
var from_inp = false;

function check_pizz(id, price, type)
{
    var kol = 0;
	var num  = api.getElementById(id);

	if(num.value != '') kol = parseInt(num.value);
    temp1 = kol;

	switch(type){
		case 'add' : kol++; break;
		case 'del' : kol--; break;
	};

	if(kol < 0) kol = 0;
	num.value = parseInt(kol);
	temp2 = kol;
	update_pizz(id, price)
}

function update_pizz(id, price)
{
    var itog = 0;
	var kol = 0;

	var num  = api.getElementById(id);
	var summ = api.getElementById('zakaz_summ');
	var show_summ = api.getElementById('show_summ');
	var show_summ2 = api.getElementById('show_summ2');

    price = parseInt(price);
	if(num.value != '')	kol = parseInt(num.value);

    itog = parseInt(summ.value - temp1*price);
    if(from_inp) itog = parseInt(itog + kol*price);
	    else itog = parseInt(itog + temp2*price);

	summ.value = itog;
	show_summ.innerHTML = summ.value + ' руб.';
	show_summ2.innerHTML = summ.value + ' руб.';
	if(itog>0)
	{
	  api.getElementById('form_zakaz').style.visibility = 'visible';
	  api.getElementById('form_zakaz').style.display = 'inline';
	  api.getElementById('form_zakaz2').style.visibility = 'visible';
	  api.getElementById('form_zakaz2').style.display = 'inline';

	  api.getElementById('reset_zakaz').style.visibility = 'visible';
	  api.getElementById('reset_zakaz').style.display = 'inline';
	  api.getElementById('reset_zakaz2').style.visibility = 'visible';
	  api.getElementById('reset_zakaz2').style.display = 'inline';
	}
	else
	{
	  api.getElementById('form_zakaz').style.visibility = 'hidden';
	  api.getElementById('form_zakaz').style.display = 'none';
	  api.getElementById('form_zakaz2').style.visibility = 'hidden';
	  api.getElementById('form_zakaz2').style.display = 'none';

	  api.getElementById('reset_zakaz').style.visibility = 'hidden';
	  api.getElementById('reset_zakaz').style.display = 'none';
	  api.getElementById('reset_zakaz2').style.visibility = 'hidden';
	  api.getElementById('reset_zakaz2').style.display = 'none';
	};

	temp1 = 0;
	temp2 = 0;
	from_inp = false;
}

function save_pizz(id)
{
	if(api.getElementById(id).value!='') temp1 = parseInt(api.getElementById(id).value); else temp1 = 0;
	from_inp = true;
}

function start_pizz()
{
    var itog = 0;

	var summ = api.getElementById('zakaz_summ');
	var show_summ = api.getElementById('show_summ');
	var show_summ2 = api.getElementById('show_summ2');

	if(summ.value!='') itog = parseInt(summ.value); else itog = 0;
	if(itog>0)
	 {
	  show_summ.innerHTML = itog + ' руб.';
	  show_summ2.innerHTML = itog + ' руб.';
	  api.getElementById('form_zakaz').style.visibility = 'visible';
	  api.getElementById('form_zakaz').style.display = 'inline';
	  api.getElementById('form_zakaz2').style.visibility = 'visible';
	  api.getElementById('form_zakaz2').style.display = 'inline';

	  api.getElementById('reset_zakaz').style.visibility = 'visible';
	  api.getElementById('reset_zakaz').style.display = 'inline';
	  api.getElementById('reset_zakaz2').style.visibility = 'visible';
	  api.getElementById('reset_zakaz2').style.display = 'inline';
 	 }
 	else
	 {
	  api.getElementById('form_zakaz').style.visibility = 'hidden';
	  api.getElementById('form_zakaz').style.display = 'none';
	  api.getElementById('form_zakaz2').style.visibility = 'hidden';
	  api.getElementById('form_zakaz2').style.display = 'none';

	  api.getElementById('reset_zakaz').style.visibility = 'hidden';
	  api.getElementById('reset_zakaz').style.display = 'none';
	  api.getElementById('reset_zakaz2').style.visibility = 'hidden';
	  api.getElementById('reset_zakaz2').style.display = 'none';
 	 };

}