function emilcimjoe(emilcim) {
    a=emilcim.indexOf('@');
    b=emilcim.indexOf('.',a);
    if(a>0 && b>0 && b>a+1 && b<emilcim.length-1) return true;
    else return false;
}

function wo(url,w,x,y) {
  if (!x) { x=500; }
  if (!y) { y=460; }
  window.open(url,w,'width='+x+',height='+y+',scrollbars=yes,status=0,menubar=0,location=0,resizable=1');
  return false;
}

function MM_preloadImages() { //v1.2
  if (document.images) {
    var imgFiles = MM_preloadImages.arguments;
    var preloadArray = new Array();
    for (var i=0; i<imgFiles.length; i++) {
      preloadArray[i] = new Image;
      preloadArray[i].src = imgFiles[i];
    }
  }
}

function MM_swapImage() { //v1.2
  var i,j=0,objStr,obj,swapArray=new Array,oldArray=document.MM_swapImgData;
  for (i=0; i < (MM_swapImage.arguments.length-2); i+=3) {
    objStr = MM_swapImage.arguments[(navigator.appName == 'Netscape')?i:i+1];
    if ((objStr.indexOf('document.layers[')==0 && document.layers==null) ||
        (objStr.indexOf('document.all[')   ==0 && document.all   ==null))
      objStr = 'document'+objStr.substring(objStr.lastIndexOf('.'),objStr.length);
    obj = eval(objStr);
    if (obj != null) {
      swapArray[j++] = obj;
      swapArray[j++] = (oldArray==null || oldArray[j-1]!=obj)?obj.src:oldArray[j];
      obj.src = MM_swapImage.arguments[i+2];
  } }
  document.MM_swapImgData = swapArray; //used for restore
}

function MM_swapImgRestore() { //v1.2
  if (document.MM_swapImgData != null)
    for (var i=0; i<(document.MM_swapImgData.length-1); i+=2)
      document.MM_swapImgData[i].src = document.MM_swapImgData[i+1];
}

function o2_validate() {
var valid = true, output = '';

   output += 'Nem adtál meg:\n';
       
    if (document.of.osztaly.value.length == 0) {
    valid = false;
    output += 'osztályt\n';
   }
			   
  if (document.of.tol.value.length == 0) {
     valid = false;
    output += '-tól dátumot\n';
   }

  if (document.of.ig.value.length == 0) {
     valid = false;
    output += '-ig dátumot\n';
   }

  if (document.of.evfolyam.selectedIndex == 0) {
     valid = false;
    output += 'évfolyamot\n';
   }
			       
   if (!valid)
   alert(output);
					   
   return valid;
}