// ############################## MAIN VARS ##############################
buttonColourOver	= '#edd2d2';
buttonColourOut		= '#f0f0f0';

// ############################## NEW PROTOTYPES ##############################
String.prototype.repeat = function(l){
	return new Array(l+1).join(this);
};

// ############################## SHOWRESULT FUNCTIONS ##############################
function print_showResults ( results ) {
	var resultsBox = document.getElementById('divShowResults');
	resultsBox.innerHTML = results;
}

function print_pagecontent ( content, targetObjectID ) {
	var targetObject = document.getElementById(targetObjectID);
	targetObject.innerHTML = content;
}

// ############################## STATISTICS FUNCTIONS ##############################
/* Get HTTP object */
function getHTTPObject() {
  var xmlhttp;
  if (!xmlhttp && typeof XMLHttpRequest != 'undefined') {
    try {
      xmlhttp = new XMLHttpRequest();
	  //If fetching xml, use overrideMimeType
	  //xmlhttp.overrideMimeType("text/xml"); 
    } catch (e) {
      xmlhttp = false;
    }
  }
  return xmlhttp;
}
//http object called - default not active
var isWorking = false;
/* Create the HTTP object */
var http = getHTTPObject();

function writeFileStatistics ( fileName, fileType, pageLocation ) {
	var pageLocation = (pageLocation == null) ? "default" : "";
	if(!fileType) {return;}	
	if (trim(fileName) && !isWorking && http) {	
		// The server-side script
		var url = "static/scripts/script_writefilestats.php?fileName="+escape(fileName)+"&fileType="+escape(fileType)+"&pageLocation="+escape(pageLocation);
		//Send http request
		isWorking = true;
		http.open("GET", url, true);

		http.onreadystatechange = function () {
			//http.onreadystatechange = handleHttpResponse; [handleHttpResponse is a function]
			if (http.readyState == 4) {
				if (http.responseText.indexOf('invalid') == -1) {
					isWorking = false;
					//var xmlDocument = http.responseXML;
				}
			}
		};
		http.send(null);		
	}
	return;
}

// ############################## ADD/STRIP SLASHES ##############################
function addslashes(str) {
	str=str.replace(/\'/g,'\\\'');
	str=str.replace(/\"/g,'\\"');
	str=str.replace(/\\/g,'\\\\');
	str=str.replace(/\0/g,'\\0');
	return str;
}
function stripslashes(str) {
	str=str.replace(/\\'/g,'\'');
	str=str.replace(/\\"/g,'"');
	str=str.replace(/\\\\/g,'\\');
	str=str.replace(/\\0/g,'\0');
	return str;
}

// ############################## TRIM ##############################
function trim( inputString ) {
	//leading whitespace
	var regex1 = /\s*((\S+\s*)*)/;
	//trailing whitespace
	var regex2 = /((\s*\S+)*)\s*/;
	if(inputString) {
		inputString = inputString.replace(regex1, "$1");
		inputString = inputString.replace(regex2, "$1");
	}
	return inputString;
};

// ############################## DEBUG FUNCTIONS ##############################
/**
* Function : dump()
* Arguments: The data - array,hash(associative array),object
*    The level - OPTIONAL
* Returns  : The textual representation of the array.
* This function was inspired by the print_r function of PHP.
* This will accept some data as the argument and return a
* text that will be a more readable version of the
* array/hash/object that is given.
*/
function print_r (arr,level) {
	var dumped_text = "";
	if(!level) level = 0;
	
	//The padding given at the beginning of the line.
	var level_padding = "";
	for(var j=0;j<level+1;j++) level_padding += "    ";
	
	if(typeof(arr) == 'object') { //Array/Hashes/Objects
	 for(var item in arr) {
	  var value = arr[item];
	 
	  if(typeof(value) == 'object') { //If it is an array,
	   dumped_text += level_padding + "'" + item + "' ...\n";
	   dumped_text += dump(value,level+1);
	  } else {
	   dumped_text += level_padding + "'" + item + "' => \"" + value + "\"\n";
	  }
	 }
	} else { //Stings/Chars/Numbers etc.
	 dumped_text = "===>"+arr+"<===("+typeof(arr)+")";
	}
	return dumped_text;
} 

function isArray(obj) {
   if (obj.constructor.toString().indexOf("Array") == -1)
      return false;
   else
      return true;
}

// ############################## SPRINTF LEADING ZEROES #############
function padDigits(n, totalDigits) {
	n = n.toString(); 
	var pd = ''; 
	if (totalDigits > n.length) { 
		for (i=0; i < (totalDigits-n.length); i++) {
			pd += '0';
		}
	}
	return pd + n.toString(); 
} 

// ############################## ISSET ##############################
function isset(varname)  {
  if(typeof( window[ varname ] ) != "undefined") return true;
  else return false;
}

// ############################## PRINT EMAIL ADDRESSES ##############################
function printEmailAddress ( emailUser, emailDomain, emailTopLevel, innerHTML ) {
 	if(!trim(innerHTML) || innerHTML.toLowerCase()=="email") {innerHTML = emailUser+'@'+emailDomain+'.'+emailTopLevel;	}
	var emailString = '<a href="mailto:'+emailUser+'@'+emailDomain+'.'+emailTopLevel+'">'+innerHTML+'</a>';
	document.write (emailString);
}

// ############################## FORM FUNCTIONS ##############################
function txtOnFocus (obj) {
        obj.style.backgroundImage = '';
}

function txtOnBlur (obj,image) {
        if (obj.value == '') {
        obj.style.backgroundImage = 'url(' + image + ')';
		obj.style.backgroundRepeat = 'no-repeat';
		obj.style.backgroundPositon = 'left center';
	}
}

function bgcolor (thisObjectID, color) {
if (!color) {color='';}
	var thisObject = document.getElementById(thisObjectID);
	if (objectClickedID==thisObjectID) {
		color=markedBGcolor;
	} else {
		thisObject.style.backgroundColor=color;
	}
}

function confirm_logout( targetURL ) {
	input_box = confirm("Weet u zeker dat u wilt uitloggen?");
	if (input_box==true) {
		//window.location = "index.php?show=login&do=logout";
		window.location = targetURL;
	}
}

// ############################## UPLOAD FUNCTIONS ##############################
function preloadimages ( ) {
	var myimages=new Array();
	for (i=0;i<preloadimages.arguments.length;i++) {
		alert("preloading "+preloadimages.arguments[i]);
		img_pre[i]=new Image();
		img_pre[i].src=preloadimages.arguments[i];
	}
}

function showTestAnswer (targetObject, newStatus) {
	if(is_ie) {newStatus="block";}
	if (document.getElementById) {
		// this is the way the standards work
		//alert("document.getElementById");
		var targetObject_style = document.getElementById(targetObject).style;
		if(targetObject_style.display=="none"){targetObject_style.display=newStatus;}
		else {targetObject_style.display="none";}
	}
	 else if (document.all) {
		// this is the way old msie versions work
		//alert("document.all");
		var targetObject_style = document.all[targetObject].style;
		if(targetObject_style.display=="none"){targetObject_style.display=newStatus;}
		else {targetObject_style.display="none";}
	} else if (document.layers) {
		// this is the way nn4 works
		//alert("document.layers");
		var targetObject_style = document.layers[targetObject].style;
		if(targetObject_style.display=="none"){targetObject_style.display=newStatus;}
		else {targetObject_style.display="none";}
	}
}

function setBackground(thisObjectID, imageName) {
	var imageObject = "url(./images/"+imageName+")";
	if (document.getElementById) {
		// this is the way the standards work
		var thisObject = document.getElementById(thisObjectID);
		thisObject.style.backgroundImage=imageObject;
	}
	 else if (document.all) {
		// this is the way old msie versions work
		var thisObject = document.all[thisObjectID];
		thisObject.style.backgroundImage=imageObject;
	} else if (document.layers) {
		// this is the way nn4 works
		var thisObject = document.layers[thisObjectID];
		thisObject.style.backgroundImage=imageObject;
	}
}

/* Toggle layer */
function toggleLayer(layer1, layer2) {
	if (document.getElementById) {
		// this is the way the standards work
		var layer1_style = document.getElementById(layer1).style;
		var layer2_style = document.getElementById(layer2).style;
		layer1_style.display = "block";
		layer2_style.display = "none";
	}
	 else if (document.all) {
		// this is the way old msie versions work
		var layer1_style = document.all[layer1].style;
		var layer2_style = document.all[layer2].style;
		layer1_style.display = "block";
		layer2_style.display = "none";
	} else if (document.layers) {
		// this is the way nn4 works
		var layer1_style = document.layers[layer1].style;
		var layer2_style = document.layers[layer2].style;
		layer1_style.display = "block";
		layer2_style.display = "none";
	}
}

function showhideLayer (targetObject, newStatus) {
	if(is_ie) {newStatus="block";}
	if (document.getElementById) {
		// this is the way the standards work
		//alert("document.getElementById");
		var targetObject_style = document.getElementById(targetObject).style;
		if(targetObject_style.display=="none" || targetObject_style.display==""){targetObject_style.display=newStatus;}
		else {targetObject_style.display="none";}
	}
	 else if (document.all) {
		// this is the way old msie versions work
		//alert("document.all");
		var targetObject_style = document.all[targetObject].style;
		if(targetObject_style.display=="none" || targetObject_style.display==""){targetObject_style.display=newStatus;}
		else {targetObject_style.display="none";}
	} else if (document.layers) {
		// this is the way nn4 works
		//alert("document.layers");
		var targetObject_style = document.layers[targetObject].style;
		if(targetObject_style.display=="none" || targetObject_style.display==""){targetObject_style.display=newStatus;}
		else {targetObject_style.display="none";}
	}
}

activeVideoID = "";
function toggleVideo (newStatus, videoFile, targetObjectID, width, height) {
	if(!width) { width = 270;}
	if(!height) { height = 270;}
	var targetObject = document.getElementById(targetObjectID);	

	//Close active video before opening new video
	if(activeVideoID!=="" && activeVideoID!==targetObjectID) {
		var activeVideoObject = document.getElementById(activeVideoID);
		activeVideoObject.innerHTML='';
	}
	if(newStatus) {
		activeVideoID = targetObjectID;	
		targetObject.innerHTML='<table border=0 cellpadding=0 cellspacing=0><tr><td style=\"text-align:right;background-color:#b3aed1;\"><a href=\"javascript:toggleVideo(0,\'dummyName\',\''+targetObjectID+'\');\"><img src=\"./static/images/icons/icon_closewindow.jpg\" border=\"0\"></a></td></tr><tr><td><div style=\"width:'+width+'px;height:'+height+'px;text-align:center;vertical-align:middle;background-image:url(\'./static/images/background/bg_videoplayer.jpg\');background-repeat:no-repeat;\"><object id=\"WMV\" classid=\"CLSID:2179C5D3-EBFF-11CF-B6FD-00AA00B4E220\" codebase=\"http://www.microsoft.com/netshow/download/en/nsmp2inf.cab#Version= 5,1,51,415\" standby=\"Loading Microsoft Media Player components...\" type=\"application/x-oleobject\" width=\"'+width+'\" height=\"'+height+'\"><param name=\"FileName\" value=\"'+videoFile+'\"><param name=\"autostart\" value=\"true\"><param name=\"ShowControls\" value=\"true\"><param name=\"ShowDisplay\" value=\"false\"><param name=\"ShowStatusBar\" value=\"true\"><embed type=\"application/x-mplayer2\" name=\"MediaPlayer\" background=\"images/testclip.jpg\" transparentAtStart=\"true\" autostart=\"true\" width=\"'+width+'\" height=\"'+height+'\" src=\"'+videoFile+'\" showstatusbar=\"true\" showcontrols=\"true\" showdisplay=\"false\" pluginspage=\"http://www.microsoft.com/netshow/download/player.htm\"></embed></object></div></td></tr></table>';
		//Write file statistics
		writeFileStatistics(videoFile.substring(videoFile.lastIndexOf("/")+1) , "MOVIE" ,"");
	} else {
		targetObject.innerHTML='';
	}
}

function flvVideo (videoFile, videoTitle) {
	document.getElementById('flashcontent').style.display = "block";
	document.getElementById('main_image').innerHTML = '<img src="./static/images/1pix.gif" width="160" height="122" border="0" align="top">';
	var so = new SWFObject("./flash/tw_videoplayer.swf", "mymovie", "200", "150", "8", "#ffffff");
	so.addVariable("videoFile", videoFile);
	//so.addVariable("videoFile", "luisteren_high.flv");
	so.addVariable("videoTitle", videoTitle);
	so.write("flashcontent");
}

function highlightText ( strSearchTerm ) {
	var searchTerm	= strSearchTerm.split(" ");
	var txt_search	= "";
	var txt_replace	= "";
	var txt_content	= "";
	//alert(txt_content);
	//alert(document.getElementById('main_content').innerText);
	for (i=0;i<searchTerm.length;i++) {
		txt_content	= document.getElementById('main_content').innerHTML;
		//myregexp = new RegExp(regexstring);
		//txt_search	= "/"+searchTerm[i]+"/g";
		// /<\S[^><]*>/g
		txt_search	= "/(?![^<]+>)"+searchTerm[i]+"(?![^<]+>)/g";
		txt_replace	= "<span class='tekst_highlight'>"+searchTerm[i]+"</span>";
		document.getElementById('main_content').innerHTML = txt_content.replace(eval(txt_search),txt_replace);
	}
}

function externalLinks() { 
 //HTML 4.0 standard, target="_blank" obsolete, use instead: rel="external" in combination with this function
 if (!document.getElementsByTagName) return; 
 var anchors = document.getElementsByTagName("a"); 
 for (var i=0; i<anchors.length; i++) { 
   var anchor = anchors[i]; 
   if (anchor.getAttribute("href") && 
       anchor.getAttribute("rel") == "external") 
     anchor.target = "_blank"; 
 } 
} 
window.onload = externalLinks;

function selectQuizWord (varID, varValue, spanElementBase) {
	//alert ("ID="+varID+", Value="+varValue);
	var spanWordElement = "";

	try {document.getElementById(varID).value = varValue;} catch (e) {}

	for (i=0;i<=6;i++) {
		spanWordElement = spanElementBase+"_"+i;
		if (i==varValue) {
			try {document.getElementById(spanWordElement).style.backgroundColor = "#ddddad";} catch (e) {}
			try {document.getElementById(spanWordElement).style.border = "1px solid #f0f000";} catch (e) {}
		} else {
			try {document.getElementById(spanWordElement).style.backgroundColor = "";} catch (e) {}
			try {document.getElementById(spanWordElement).style.border = "0";} catch (e) {}
		}
	}
}