function checkrez1 ()
{
	var category = document.getElementById("rez_category").value;
	var rent_office = document.getElementById("rez_rent_office").value;
	var p_date = document.getElementById("p_date").value;
	var p_month = document.getElementById("p_month").value;
	var p_year = document.getElementById("p_year").value;
	var p_hour = document.getElementById("p_hour").value;
	var p_minute = document.getElementById("p_minute").value;
	
	var return_office = document.getElementById("return_office").value;
	var r_date = document.getElementById("r_date").value;
	var r_month = document.getElementById("r_month").value;
	var r_year = document.getElementById("r_year").value;
	
	var r_hour = document.getElementById("r_hour").value;
	var r_minute = document.getElementById("r_minute").value;
	
	// format datuma mora biti MM/dd/YY
	
	var rent_datum = p_month + "/" + p_date + "/" + p_year;
	var rent_time = p_hour + ":" + p_minute + ":" + "30";
	var return_datum = r_month + "/" + r_date + "/" + r_year;
	var return_time = r_hour + ":" + r_minute + ":" + "30";

	var check = dateDiff(rent_datum, rent_time, return_datum, return_time);
	
	if (check)
	{	  
	  if (rent_office == 1) 
	  	{
	    document.getElementById("upoz").innerHTML = "<em>*</em> <b>Rent office is empty</b>";
	  
	  	return false;
		}
	  else
	  {
	    if (return_office == 1) 
		{  
		document.getElementById("upoz").innerHTML = "<em>*</em> <b>Return office is empty</b>";
	  
	  	return false;
		}
	    
	    else
	    {
	  		document.forma.action = "index.php?opt=rez2";
	   	   	 document.forma.submit();
	   }
	  }
	}
	else
	{
	  document.getElementById("upoz").innerHTML = "<em>*</em> <b>Time rent/return is not ok</b>";
	  
	  return false;
	}
} 

function dateDiff(dejt1, time1, dejt2, time2) {
date1 = new Date();
date2 = new Date();
diff  = new Date();

 
date1temp = new Date(dejt1 + " " + time1);
date1.setTime(date1temp.getTime());


date2temp = new Date(dejt2 + " " + time2);
date2.setTime(date2temp.getTime());


var mladen = date2.getTime() - date1.getTime();
	if (mladen > 0)
	{
	  return true;
	}
}

function checkrez2 ()
{
  	var country = document.getElementById("country").value;
  	var email = document.getElementById("email").value;
  	var telephone = document.getElementById("telephone").value;
  	var fax = document.getElementById("fax").value;
  	var first_name = document.getElementById("first_name").value;
  	var surname = document.getElementById("surname").value;
  	var address = document.getElementById("address").value;
  	var city = document.getElementById("city").value;
  	var country = document.getElementById("country").value;
  	

  	if (first_name == "") 
	  	{ 
		    document.getElementById("upoz").innerHTML = "<em>*</em> <b>Firstname is empty</b>";
	  		return false; 
		}
  	else 
  	{
	 if (surname == "") 
	 	{
		   document.getElementById("upoz").innerHTML = "<em>*</em> <b>Surname is empty</b>";
    	   return false; 
		}
	 	else
	 	{
					if (email == "") 
						{
					  	   document.getElementById("upoz").innerHTML = "<em>*</em> <b>Email is empty</b>";
	  					   return false; 
						}
					else
					{
							document.forma.action = "index.php?opt=rez3";
	   	    				document.forma.submit();			  
					}				     
		}
	}
}