function price_onfocus() {
	if (!document.getElementById) return;
	var input = document.getElementById('price');
	if (input) {
		// vymazat description
		if (input.value == price_desc)
			input.value = '';
	}
}
function price_onblur() {
	if (!document.getElementById) return;
	var input = document.getElementById('price');
	if (input) {
		// doplnit description
		if (input.value == '')
			input.value = price_desc;
	}
}
function city_onfocus() {
	if (!document.getElementById) return;
	var input = document.getElementById('city');
	if (input) {
		// vymazat description
		if (input.value == city_desc)
			input.value = '';
	}
}
function city_onblur() {
	if (!document.getElementById) return;
	var input = document.getElementById('city');
	if (input) {
		// doplnit description
		if (input.value == '')
			input.value = city_desc;
	}
}

var code_desc = '';

function code_onfocus() {
	if (!document.getElementById) return;
	var input = document.getElementById('code');
	if (input) {
		// ulozit description
		if (code_desc == '')
			code_desc = input.value;
		// vymazat description
		if (input.value == code_desc)
			input.value = '';
	}
}
function code_onblur() {
	if (!document.getElementById) return;
	var input = document.getElementById('code');
	if (input) {
		// doplnit description
		if (input.value == '')
			input.value = code_desc;
	}
}