// JScript File

function getQuerystring(key, default_)
{
  if (default_==null) default_=""; 
  key = key.replace(/[\[]/,"\\\[").replace(/[\]]/,"\\\]");
  var regex = new RegExp("[\\?&]"+key+"=([^&#]*)");
  var qs = regex.exec(window.location.href);
  if(qs == null)
    return default_;
  else
    return URLDecode(qs[1]);
}

function URLEncode( strValue )
{
	// 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";
 
	var plaintext = strValue;
	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( strValue )
{
   // Replace + with ' '
   // Replace %xx with equivalent character
   // Put [ERROR] in output if %xx is invalid.
   var HEXCHARS = "0123456789ABCDEFabcdef"; 
   var encoded = strValue;
   var plaintext = "";
   var i = 0;
   while (i < encoded.length) 
   {
     
     var ch = encoded.charAt(i);  
	   
     if (ch == "+") 
     {
       plaintext += " ";
	     i++;
     } 
     else if (ch == "%") 
     {
     // Fix the "ñ" character
		  if (ch == "%" && encoded.charAt(i+1) == "c" && encoded.charAt(i+2) == "3" && encoded.charAt(i+3) == "%" && encoded.charAt(i+4) == "b" && encoded.charAt(i+5) == "1")
		  {
		    plaintext += "ñ"
		    i += 6;
		  }
		  else 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;
};