function zobrazSkryj(idecko) {
	el=document.getElementById(idecko).style;
	el.display=(el.display == 'block')?'none':'block';
}

function show(idecko){
	var el = document.getElementById(idecko).style;
	el.display = 'block';
}
function hide(idecko){
	var el = document.getElementById(idecko).style;
	el.display = 'none';
}

function checkUsernameForLength(whatYouTyped,pocet,css) {
	var fieldset = whatYouTyped.parentNode;
	var txt = whatYouTyped.value;
	if (txt.length > pocet) {
		fieldset.className = "welldone_"+css;
		whatYouTyped.className = "registrace_text_ok";		
	}
	else {
		fieldset.className = "";
		whatYouTyped.className = "registrace_text_red";		
	}
}

function checkPassword(whatYouTyped) {
	var fieldset = whatYouTyped.parentNode;
	var txt = whatYouTyped.value;
	if (txt.length > 3 && txt.length < 8) {
		fieldset.className = "kindagood";
		whatYouTyped.className = "registrace_text_ok";			
	} else if (txt.length > 7) {
		fieldset.className = "welldone_290";
		whatYouTyped.className = "registrace_text_ok";			
	} else {
		fieldset.className = "";
		whatYouTyped.className = "registrace_text_red";			
	}
}

function checkEmail(whatYouTyped) {
	var fieldset = whatYouTyped.parentNode;
	var txt = whatYouTyped.value;
	if (/^\w+([\.-]?\w+)*@\w+([\.-]?\w+)*(\.\w{2,3})+$/.test(txt)) {
		fieldset.className = "welldone";
	} else {
		fieldset.className = "";
	}
}

function addLoadEvent(func) {
  var oldonload = window.onload;
  if (typeof window.onload != 'function') {
    window.onload = func;
  } else {
    window.onload = function() {
      oldonload();
      func();
    }
  }
}

function prepareInputsForHints() {
  var inputs = document.getElementsByTagName("input");
  for (var i=0; i<inputs.length; i++){
	var inp = document.getElementsByTagName("input")[i];
	if (inp.type != "radio") {
		inputs[i].onfocus = function () {
		  this.parentNode.getElementsByTagName("span")[0].style.display = "inline";
		}
		inputs[i].onblur = function () {
		  this.parentNode.getElementsByTagName("span")[0].style.display = "none";
		}
	}
  }
}
addLoadEvent(prepareInputsForHints);