// ====================================================================
//       URLEncode and URLDecode functions
//
// Copyright Albion Research Ltd. 2002
// http://www.albionresearch.com/
//
// You may copy these functions providing that 
// (a) you leave this copyright notice intact, and 
// (b) if you use these functions on a publicly accessible
//     web site you include a credit somewhere on the web site 
//     with a link back to http://www.albionresarch.com/
//
// If you find or fix any bugs, please let us know at albionresearch.com
//
// SpecialThanks to Neelesh Thakur for being the first to
// report a bug in URLDecode() - now fixed 2003-02-19.
// ====================================================================
function URLEncode(url)
{
	// The Javascript escape and unescape functions do not correspond
	// with what browsers actually do...
	var SAFECHARS = "0123456789" +					// Numeric
					"ABCDEFGHIJKLMNOPQRSTUVWXYZ" +	// Alphabetic
					"abcdefghijklmnopqrstuvwxyz" +
					"-_.!~*'()";					// RFC2396 Mark characters
	var HEX = "0123456789ABCDEF";

    if (!url) return "";
	var plaintext = url;
	var encoded = "";
	for (var i = 0; i < plaintext.length; i++ ) {
		var ch = plaintext.charAt(i);
	    if (ch == " ") {
		    encoded += "+";				// x-www-urlencoded, rather than %20
		} else if (SAFECHARS.indexOf(ch) != -1) {
		    encoded += ch;
		} else {
		    var charCode = ch.charCodeAt(0);
			if (charCode > 255) {
//			    alert( "Unicode Character '" 
//                        + ch 
//                        + "' cannot be encoded using standard URL encoding.\n" +
//				          "(URL encoding only supports 8-bit characters.)\n" +
//						  "A space (+) will be substituted." );
				encoded += "+";
			} else {
				encoded += "%";
				encoded += HEX.charAt((charCode >> 4) & 0xF);
				encoded += HEX.charAt(charCode & 0xF);
			}
		}
	} // for
	
	return encoded;
};

function URLDecode(url )
{
   // Replace + with ' '
   // Replace %xx with equivalent character
   // Put [ERROR] in output if %xx is invalid.
   var HEXCHARS = "0123456789ABCDEFabcdef"; 
   var encoded = url;
   var plaintext = "";
   var i = 0;
   while (i < encoded.length) {
       var ch = encoded.charAt(i);
	   if (ch == "+") {
	       plaintext += " ";
		   i++;
	   } else if (ch == "%") {
			if (i < (encoded.length-2) 
					&& HEXCHARS.indexOf(encoded.charAt(i+1)) != -1 
					&& HEXCHARS.indexOf(encoded.charAt(i+2)) != -1 ) {
				plaintext += unescape( encoded.substr(i,3) );
				i += 3;
			} else {
//				alert( 'Bad escape combination near ...' + encoded.substr(i) );
				plaintext += "%[ERROR]";
				i++;
			}
		} else {
		   plaintext += ch;
		   i++;
		}
	} // while   
   return plaintext;
};

  function PopupWin(url) {
      win = window.open(url);    
      return (typeof(win)=='object')?false:true;
  }

  function Odoslat() {
    frm = document.forms['anketaForm'];
    frm.submit();             
  }

  function PopupImg(url, id, typ) {      
      win = window.open("/showimg.php?url="+URLEncode(url)+"&id="+URLEncode(id)+"&typ="+URLEncode(typ),"skvelynakupimg", "width=500,height=350,left=0,top=0,screenX=0,screenY=0,location=no,menubar=no,resizable=no,scrollbars=no,status=no,titlebar=no,toolbar=no,directories=no");
      return (typeof(win)=='object')?false:true;
  }

  function canSearch(frm) { 
      frm = document.forms['searchForm'];       
      if (frm.search.value.length<3) {
          alert("Vyhľadávaný reťazec musí mať aspoň 3 znaky");
          return false;
      }  else {
      if (frm.search.value.length>40) {
          alert("Vyhľadávaný reťazec musí byť menší ako 40 znakov");
          return false;
      }else
      {return true;}
      }
  }
  
    function Kontrola ()
    {
      validRegExp = /^[-!#$%&\'*+\\.\/0-9=?A-Z^_`{|}~]+@([-0-9A-Z]+\.)+([0-9A-Z]){2,3}$/i;
      strEmail = document.formular.mail.value;
      
       if (document.formular.meno.value == "")
       {
          document.formular.meno.focus();
          alert ("Nezadali ste vaše meno");
          return false;
       }
       if (document.formular.mail.value == "")
       {
          document.formular.mail.focus();
          alert ("Nezadali ste váš e-mail");
          return false;
       }   
        if (strEmail.search(validRegExp) == -1)
        {                      
          alert('Nesprávny formát e-mailovej adresy !');
          return false;
        } 
       if (document.formular.telefon.value == "")
       {
          document.formular.telefon.focus();
          alert ("Nezadali ste vaše telefónne číslo");
          return false;
       }
                          
       if (document.formular.text.value == "")
       {
          document.formular.text.focus();
          alert ("Nezadali ste text správy");
          return false;
       }
    }