function validateForm(frmElem) {
	var result = true;
	var arElems = new Array("Name", "Phone", "Email", "Login", "Password");
	
	for (var i = 0; i < arElems.length; i++) {
		var elem = frmElem.elements[arElems[i]];
		if (elem.value == "") {
			result = false;
			elem.focus();
		}
	}
	
	if (frmElem.elements['Clen'].selected == 1 
    && frmElem.elements['Cislo'].value == '') {
	  $result = false;
	  frmElem.elements['Cislo'].focus();
	}
	
	if (!result)
		alert("Nebyly zadány všechny povinné údaje!");
	return result;
}