function clearInput(id) {
			document.getElementById(id).value = "";		
		}
		
		function hideInput() {
			var fieldsToHide = new Array("innyZadruk","innyFormat");
			for (var i=0; i<fieldsToHide.length; i++) {
				document.getElementById(fieldsToHide[i]).style.display = "none";	
				}
			var allChboxesToHide = document.getElementsByTagName("input");
			
				for (var i=0; i<allChboxesToHide.length; i++) {
					if (allChboxesToHide[i].className.indexOf("clear") > -1) {
						allChboxesToHide[i].disabled = "disabled";
					}
				}
		}
		
		function podmiana(what,nameIt) {
			var optionsCount = document.getElementById(what).options.length;
			optionsCount = optionsCount-1;
			var lastOne = document.getElementById(what).selectedIndex;
			if (optionsCount == lastOne) {			 
				document.getElementById(nameIt).style.display = "block";
			} else {
				document.getElementById(nameIt).style.display = "none";
			}
		}
		
		function checkIt(what) {
		
			var allChboxes = document.getElementsByTagName("input");
			for (var i=0; i<allChboxes.length; i++) {
				if (allChboxes[i].className.indexOf(what) > -1) {
						if (what == "lakieruv" || what == "lakieruv_c") {
							var jeden = document.formularz.lakieruv;
							var dwa = document.formularz.lakieruv_c;
							
							if (jeden.checked || dwa.checked) {
							allChboxes[i].disabled = false;
								if (what == "lakieruv") {
									dwa.checked  = false;
								}
								if (what == "lakieruv_c") {
									jeden.checked  = false;
								}
							} else {
							allChboxes[i].disabled = "disabled";
							}
						} else {
							if (allChboxes[i].disabled) {
								allChboxes[i].disabled = false;
							} else {
								allChboxes[i].disabled = "disabled";
							}
						}
						
					}	
				}
			
		}
		
		function hideNotatnion(what) {
			document.getElementById(what+"_w").style.display = "none";
			document.getElementById(what).style.backgroundColor = "white";
		}
		
		function sprawdz() {
			
			var errors = '';
			
			var fname_one = document.getElementById("fname");
			var fname_two = document.getElementById("mail");
			var fname_tree = document.getElementById("phone");
			
			if (fname_one.value == "") { 
				errors+="blad";
				document.getElementById("fname_w").style.display = "block";
				document.getElementById("fname").style.backgroundColor = "yellow";
			} else {
				errors == '';
			}
			
			
			if (fname_two.value == "") { 
				errors+="blad";
				document.getElementById("mail_w").style.display = "block";
				document.getElementById("mail").style.backgroundColor = "yellow";
			} else {
				errors == '';
			}			
			
			if (fname_tree.value == "") { 
				errors+="blad";
				document.getElementById("phone_w").style.display = "block";
				document.getElementById("phone").style.backgroundColor = "yellow";
			} else {
				errors == '';
			}

			if(errors == '') {
				return true;
			} else { 
				return false;
			}
			
		}