/*----------------------------------------------------------------------------------------------------------------------------*/
/* Simply swap an image */

function swapImg(img,src)
{
	img.src = src;
	return true;
}


/*----------------------------------------------------------------------------------------------------------------------------*/
/* URL encode and decode */
function URLEncode(plaintext)
{
	// 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 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(encoded)
{
   // Replace + with ' '
   // Replace %xx with equivalent character
   // Put [ERROR] in output if %xx is invalid.
   var HEXCHARS = "0123456789ABCDEFabcdef"; 
   
   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);
};

/*----------------------------------------------------------------------------------------------------------------------------*/
/* Get something from GET query */

function getQueryVariable(variable) {
  var query = window.location.search.substring(1);
  var vars = query.split("&");
  for (var i=0;i<vars.length;i++) {
    var pair = vars[i].split("=");
    if (pair[0] == variable) {
      return URLDecode(pair[1]);
    }
  } 
}



/*----------------------------------------------------------------------------------------------------------------------------*/
/* Handle mouseover for images in topmenu */

function topMenuOver(oImg)
{
	var newSrc = oImg.src.replace('.gif','_act.gif');
	return(newSrc);	
}

/*----------------------------------------------------------------------------------------------------------------------------*/
/* Handle mouseout for images in topmenu */

function topMenuOut(oImg)
{
	var newSrc = oImg.src.replace('_act.gif','.gif');
	return(newSrc);	
	
}


/*----------------------------------------------------------------------------------------------------------------------------*/
/* Handle AJAX requests for newsletters */

function handleNewsletter(vlag,nbid)
{
	if(nbid != 'undefined')
	{
		/* Specific newsletter */
		var url = '/modules/newsletter/newsletter.php?action=newsletter&vlag='+vlag+'&nbid='+nbid;
	}
	else
	{
		/* Overview */
		var url = '/modules/newsletter/newsletter.php?action=overview&vlag='+vlag;

	}
	
	/* Prevent IE from caching .. */
	var x = Math.round(100*Math.random());
	var y = Math.round(100*Math.random());
	var z = Math.round(10*Math.random());	
	var rand = ((x*y)/z);
	var url = url+'&rand='+rand;
	
	/* Send request */
	new Ajax.Updater('newslettercontent', url);
}

/*----------------------------------------------------------------------------------------------------------------------------*/
/* Handle AJAX requests for searches */

function handleSearch(vlag,query,secret,position,start,skipbackcheck)
{
	
	if(query != '') 
	{
	
	
	
	if(!skipbackcheck)
	{
	
		/* Check if user has pressed back button on browser, to make sure the correct AJAX call is made */
		var currentUrl = document.location.href;
		var currentUrlElements = currentUrl.split('#');
		if ((!isNaN(currentUrlElements[1])) && (!currentUrlElements[1].length == 0))
		{
			var start = currentUrlElements[1];
		}
	
	}

	
	
	/* Create URL */	
	//var url = '/modules/search/search.php?query='+encodeURIComponent(query)+'&vlag='+vlag+'&start='+start;
	//var url = '/modules/search/search.php?query='+encodeURIComponent(query)+'&vlag='+vlag+'&start='+start+'&sSecret='+secret+'&position='+position;
	var url = '/modules/search/search.php?query='+encodeURIComponent(query)+'&vlag='+vlag+'&start='+start+'&position='+position+'&sSecret='+secret;

	
	//alert(secret);
	
	/* Request AJAX Update */
	new Ajax.Updater('searchresults', url);
	}
	
}