function Confirm()
{

 if (confirm("Opdavdu smazat?"))
 {
 	return true;
 }
 else
 {
 	return false;
 }

}


function check()
{
if (document.subscribe.pcs.value == '')
   {
   alert("Please submit us the number of subscriptions.");
   return false;
   }
if (((document.subscribe.company_address_street.value == '') && (document.subscribe.invoice_address_street.value == '')))
   {
   alert("Please submit us your postal or invoice address.");
   return false;
   }
else return true;
}
function sum()
{
	price = 0;
	if(!isNaN(parseInt(eval(document.getElementById("pcs").value))));
	price = 50*parseFloat(eval(document.getElementById("pcs").value));
//	x = document.subscribe.year.selectedIndex;
//  if (x > 0)	price = price;
	document.getElementById("txtprice").innerHTML=price;
}

function Check_obj()
	{
	if (!document.objednavka.name.value && !document.objednavka.adresa.value) 
	{
	 alert("Vyplňte prosím všechny políčka.");
	 return false;
	}
	else 
	{
	 return true;
	}
}

function Check_semi()
 {
	if(!document.forms[0].seminar.checked && !document.forms[0].konference.checked)
	 {
   alert("Vyberte alespoň jeden seminář.")
   return false;
   }
   else
  if(!document.forms[0].jmenoprijmeni.value || !document.forms[0].ulice.value || !document.forms[0].obecmestopsc.value || !document.forms[0].telefonfax.value)
   {
   alert("Vyplňte potřebné údaje.")
   return false;
   }
   else
    {
    if (confirm("Odeslat přihlášku?"))
	 {
	 return true;
	 }
	 else
	 {
	 return false;
	 }
	}
}