function checkAccountForm(form){
	if(form.pass1.value != form.pass2.value && form.pass1.value != ""){
		alert("Nesouhlasí hesla!");
		return false;
	}
	if(form.first_name.value == "" || form.last_name.value == "" || form.firm.value == "" || form.place_street.value == "" || form.place_psc.value == "" || form.place_phone.value == "" || form.place_town.value == ""){
		alert("Nejsou vyplněny v šechny požadované údaje!");
		return false;
	}
}

function checkRegForm(form){
	if(form.pass1.value != form.pass2.value && form.pass1.value != ""){
		alert("Nesouhlasí hesla!");
		return false;
	}
	if(!form.term.checked){
		alert("K registraci je třeba souhlasit s podmínkami!");
		return false;
	}
}

function objectInfo(obj){
	props = "";
	for(property in obj){
		 props += property + " = " + obj[property] + ";  ";
	}
	alert(props);
}

function newWindow(res, xres, yres, win_name){
	var center_x =Math.round((screen.width - xres) / 2);
	var center_y =Math.round((screen.height - yres) / 2);
	open_params ='toolbar=no,menubar=no,status=no,scrollbars=no,resizable=yes,left=' + center_x + ',top=' + center_y +',width=' + xres + ',height=' + yres;
	window.open(res, win_name, open_params);
}

function checkBid(form){
	if(Number(form.bid.value) < Number(form.min_bid.value)){
		alert("Minimální příhoz je " + form.min_bid.value + " Kč");
		return false;
	}
	if(Number(form.bid.value) > (form.min_bid.value * 5)){
		alert("Maximální povolený příhoz je " + (form.min_bid.value * 5) + " Kč");
		return false;
	}
}