function new_data(form, pole, fce){
	// treti parametr je pripadna fce ktera spousti disablovani (false/string fce)
	if (eval("form."+ pole +".options[form."+ pole +".selectedIndex].value") == -1) {
		if (fce == false) {
			eval("form."+ pole +"_new.disabled = false;");
			eval("form."+ pole +"_new.focus();");
		}
		else {
			eval(fce +"(form, false);");
		}
	}
	else {
		if (fce == false) {
			eval("form."+ pole +"_new.value = '';");
			eval("form."+ pole +"_new.disabled = true;");
		}
		else {
			eval(fce +"(form, true);");
		}
	}
}

function kontrola_num(form, vstup){
	eval("var bunka = form."+ vstup +".value;");
	eval("var prevod = parseFloat(form."+ vstup +".value);");
	if (bunka != "" && bunka != prevod){
		window.alert("pouze čísla !!!");
		eval("form."+ vstup +".select();");
		return false;
	}
}
function kontrola_cislo(form, vstup){
	eval("var bunka = form."+ vstup +".value;");
	eval("var prevod = parseFloat(form."+ vstup +".value);");
	if (bunka != "" && bunka != prevod){
		window.alert("pouze čísla, nebo s desetinou tečkou");
		eval("form."+ vstup +".select();");
		return false;
	}
}

function jump_field(hodnota, podminka, pole) {
	if (hodnota.length >= podminka){
		document.getElementById(pole).focus();
		document.getElementById(pole).select();
	}
}

function date_doplication_plus(date_in, date_out, days) {
	dat_in = new Date(parseFloat(document.getElementById(date_in +'_rok').value), parseFloat(document.getElementById(date_in +'_mes').value), parseFloat(document.getElementById(date_in +'_den').value));
	ms_in = dat_in.getTime();
	ms_out = ms_in + (days * 24 * 60 * 60 * 1000);
	dat_out = new Date(ms_out);
	document.getElementById(date_out +'_rok').value = add_zero(dat_out.getYear());
	document.getElementById(date_out +'_mes').value = add_zero(dat_out.getMonth());
	document.getElementById(date_out +'_den').value = add_zero(dat_out.getDate());
}

function add_zero(num) {
	var str = ""+ num;
	if (str.length == 1) {str = "0"+ str}
	return str;
}

function select_doplication(select_in, select_out) {
	index = document.getElementById(select_in).selectedIndex;
	document.getElementById(select_out).selectedIndex = index;
}