function MM_findObj(n, d) { //v4.01
  var p,i,x;  if(!d) d=document; if((p=n.indexOf("?"))>0&&parent.frames.length) {
    d=parent.frames[n.substring(p+1)].document; n=n.substring(0,p);}
  if(!(x=d[n])&&d.all) x=d.all[n]; for (i=0;!x&&i<d.forms.length;i++) x=d.forms[i][n];
  for(i=0;!x&&d.layers&&i<d.layers.length;i++) x=MM_findObj(n,d.layers[i].document);
  if(!x && d.getElementById) x=d.getElementById(n); return x;
}

function addLoadEvent(func) 
{
  var oldonload = window.onload;
  if (typeof window.onload != 'function') {
    window.onload = func;
  } else {
    window.onload = function() {
      if (oldonload) {
        oldonload();
      }
      func();
    }
  }
}

function addHighlightEvent(){
	trs = document.getElementsByTagName("tr");
	for(i=0; i<trs.length; i++){
		
		if(trs[i].className == "Row"){
			//chainEventHandler(trs[i], 'onmouseover', 'rowHoverOn');
			//chainEventHandler(trs[i], 'onmouseout', 'rowHoverOff');
		}
		
	}

}


/* new hover functions, the old ones are below this, they could be removed
 * once this is tested and ok. Although the new ones are only needed for tables
 * where one row spans more that one <tr>
 */
function rowHoverOn( e ){
	td = getTarget(e);
	tr = td.parentNode;
	color = "#FFAE00";
	for( i=0; i<tr.cells.length; i++ )  {
    	tr.cells[i].style.backgroundColor = color;
 	}
}

function rowHoverOff( e ){
	td = getTarget(e);
	tr = td.parentNode;
	color = "#ffffff";
  	for( i=0; i<tr.cells.length; i++ )  {
    	tr.cells[i].style.backgroundColor = color;
 	}
}

function addTextInputEvents() {
    var elem = null;
    for(f=0; f<document.forms.length; f++ )
    {
        for(e=0; e<document.forms[f].elements.length; e++ )
        {
            elem = document.forms[f].elements[e];
            if( isTextField(elem) || isTextArea(elem) || isSelect(elem) )
            {
                chainEventHandler(elem, 'onmousedown', 'addFocusStyle');
                chainEventHandler(elem, 'onfocus', 'addFocusStyle');
                chainEventHandler(elem, 'onblur', 'removeFocusStyle');
            }
            if (isSelect(elem)) {
                chainEventHandler(elem, 'onkeypress', 'quickSelect');
            }
        }
    }
}

function addTabEvents()
{
    var elem = null;
    // per form
    for(f=0; f<document.forms.length; f++ )
    {
        if( document.forms[f].getAttribute("dirtyenabled") )
        {
            // per element of that form
            for(e=0; e<document.forms[f].elements.length; e++ )
            {
                elem = document.forms[f].elements[e];
                if( isTextField(elem) || isTextArea(elem) || isSelect(elem) )
                {
                    chainEventHandler(elem, 'onchange', 'setDirtyFlag');
                }
                
                if( isCheckbox(elem) || isRadio(elem) )
                {
                    chainEventHandler(elem, 'onclick', 'setDirtyFlag');
                }
    
                if( isSubmit(elem) )
                {
                    chainEventHandler(elem, 'onclick', 'resetDirtyFlag');
                }
            }
        }
    }
}

function isTextField(elem)
{
    return (elem && elem.type && (elem.type.toLowerCase()=="text" || elem.type.toLowerCase()=="password"))
}

function isTextArea(elem)
{
    return (elem && elem.tagName && elem.tagName.toLowerCase()=="textarea");
}

function isSelect(elem)
{
    return (elem && elem.tagName && elem.tagName.toLowerCase()=="select");
}

function isCheckbox(elem)
{
    return (elem && elem.type && elem.type.toLowerCase()=="checkbox")
}

function isRadio(elem)
{
    return (elem && elem.type && elem.type.toLowerCase()=="radio")
}

function isSubmit(elem)
{
    return (elem && elem.type && elem.type.toLowerCase()=="submit")
}

function chainEventHandler(elem, eventName, funcName)
{
    var oldHandler = eval("elem."+eventName);
    if( !oldHandler )
        eval("elem."+eventName+"="+funcName);
    else
    {
        eval("elem."+eventName+" = function() { oldHandler(elem); "+funcName+"(); }");
    }
}

function addFocusStyle(e)
{
    setStyle( getTarget(e), "focus", true );
}

function removeFocusStyle(e)
{
    setStyle( getTarget(e), "focus", false );
}

/**
 * element = targetelement
 * cssClassName = class of style to add/remove
 * bAdd = add or remove class from style
 */
function setStyle( element, cssClassName, bAdd )
{
    if( element )
    {
        if( bAdd )
        {
            if(element.className.indexOf(cssClassName) == -1 )
                element.className += " " + cssClassName;
        }
        else // bAdd = false
        {
            indexOfClass = element.className.indexOf(cssClassName);
            if( indexOfClass != -1 )
            {
                element.className = element.className.substring(0, indexOfClass-1) + element.className.substring(indexOfClass+cssClassName.length, element.className.length);
            }
        }
    }
}

// cross browser get target/source(?) of event
function getTarget(e)
{
    if (!e) var e = window.event;
    if (e.target) 
        return e.target;
    else 
        return e.srcElement;
}

/**
 * quick select functionality for select boxes
 */
var quickSelectKeystrokes;
var quickSelectObjectWithFocus;
var quickSelectLastKeyMillis;
var quickSelectTimer;

function quickSelect(e) {
    obj = getTarget(e);
    currentTimeMillis = new Date();
    currentTimeMillis = currentTimeMillis.valueOf();

    interval = 1000;

    if (currentTimeMillis > quickSelectLastKeyMillis + interval || obj.id != quickSelectObjectWithFocus) {
        quickSelectKeystrokes = null;
        quickSelectObjectWithFocus = obj.id;
    } 

    quickSelectLastKeyMillis = currentTimeMillis;

    if(window.event) { // IE
        keynum = window.event.keyCode;
    } else if(e.which) {// Netscape/Firefox/Opera
        keynum = e.which;
    }
    
    keystroke = String.fromCharCode(keynum).toLowerCase();

    if (quickSelectKeystrokes == null) {
        quickSelectKeystrokes = keystroke;
    } else {
        if (keynum != 8) {
            quickSelectKeystrokes += keystroke;
        } else {
            quickSelectKeystrokesLength = String(quickSelectKeystrokes).length;
            quickSelectKeystrokes = String(quickSelectKeystrokes).substring(0,quickSelectKeystrokesLength-1);
            e.cancelBubble = true;
            if (e.stopPropagation) e.stopPropagation();
            // TODO: Afvangen alt-arrowLeft
            // TOOD: De backspace mag niet de "back" van de browser bereiken
        }
    }

    imax = obj.options.length;
    
    // display the keystrokes in the statusbar
    quickSelectorStatusbarMessage(obj.name + ': ' + quickSelectKeystrokes);
    clearTimeout(quickSelectTimer);
    quickSelectTimer = setTimeout("quickSelectorStatusbarMessage(''); triggerOnChange('"+obj.name+"');", interval);

    keystrokesLength = quickSelectKeystrokes.length;

    for (i = 0; i < imax ; i++) {
        currentText = obj.options[i].text;

        currentTextFragment = currentText.substr(0, keystrokesLength).toLowerCase();

        if (currentTextFragment == quickSelectKeystrokes) {
            obj.options[i].selected = true;
            break;
        }
    }
    return false;
}

function triggerOnChange(objectName)
{
    obj = MM_findObj(objectName);
    if( obj.onchange ) obj.onchange();
}

function quickSelectorStatusbarMessage(strMessage) {
    window.defaultStatus = strMessage;
    return true;
}

if (window.attachEvent) window.attachEvent("onload", liHoverFix);
/**
 * This fix is for the hover behaviour of IE6
 */ 
function liHoverFix() {
	var iehoverTXT = new RegExp(" hover\\b");
	var lis = document.getElementsByTagName("LI");
	for (var i=0; i < lis.length; i++) {
		if (window.attachEvent) {
			lis[i].onmouseover=function() {
		    								this.className=this.className.replace(iehoverTXT, "");
		      								this.className+=" hover";
		      							  }
		    lis[i].onmousemove=function() {
		    								if (this.className.indexOf("hover")==-1) {
		        								this.className=this.className.replace(iehoverTXT, "");
		        								this.className+=" hover";
		      								}
										  }
		    lis[i].onmouseout=function()  {
		    								this.className=this.className.replace(iehoverTXT, "");
										  }
		}
	}
}

function gotoFirstA(element) {
	aElements = element.getElementsByTagName("A");
	if ( aElements.length > 0 ) {
		document.location.href = aElements[0].href;
	}
}

function unserialize(data){
    // http://kevin.vanzonneveld.net
    // +     original by: Arpad Ray (mailto:arpad@php.net)
    // +     improved by: Pedro Tainha (http://www.pedrotainha.com)
    // +     bugfixed by: dptr1988
    // +      revised by: d3x
    // +     improved by: Kevin van Zonneveld (http://kevin.vanzonneveld.net)
    // %            note: Aiming for PHP-compatibility, we have to translate objects to arrays 
    // *       example 1: unserialize('a:3:{i:0;s:5:"Kevin";i:1;s:3:"van";i:2;s:9:"Zonneveld";}');
    // *       returns 1: ['Kevin', 'van', 'Zonneveld']
    // *       example 2: unserialize('a:3:{s:9:"firstName";s:5:"Kevin";s:7:"midName";s:3:"van";s:7:"surName";s:9:"Zonneveld";}');
    // *       returns 2: {firstName: 'Kevin', midName: 'van', surName: 'Zonneveld'}
    
    
 
    var error = function (type, msg, filename, line){throw new window[type](msg, filename, line);};
    var read_until = function (data, offset, stopchr){
        var buf = [];
        var chr = data.slice(offset, offset + 1);
        var i = 2;
        while(chr != stopchr){
            if((i+offset) > data.length){
                error('Error', 'Invalid');
            }
            buf.push(chr);
            chr = data.slice(offset + (i - 1),offset + i);
            i += 1;
        }
        return [buf.length, buf.join('')];
    };
    var read_chrs = function (data, offset, length){
        buf = [];
        for(var i = 0;i < length;i++){
            var chr = data.slice(offset + (i - 1),offset + i);
            buf.push(chr);
        }
        return [buf.length, buf.join('')];
    };
    var _unserialize = function (data, offset){
        if(!offset) offset = 0;
        var buf = [];
        var dtype = (data.slice(offset, offset + 1)).toLowerCase();
        
        var dataoffset = offset + 2;
        var typeconvert = new Function('x', 'return x');
        var chrs = 0;
        var datalength = 0;
        
        switch(dtype){
            case "i":
                typeconvert = new Function('x', 'return parseInt(x)');
                var readData = read_until(data, dataoffset, ';');
                var chrs = readData[0];
                var readdata = readData[1];
                dataoffset += chrs + 1;
            break;
            case "b":
                typeconvert = new Function('x', 'return (parseInt(x) == 1)');
                var readData = read_until(data, dataoffset, ';');
                var chrs = readData[0];
                var readdata = readData[1];
                dataoffset += chrs + 1;
            break;
            case "d":
                typeconvert = new Function('x', 'return parseFloat(x)');
                var readData = read_until(data, dataoffset, ';');
                var chrs = readData[0];
                var readdata = readData[1];
                dataoffset += chrs + 1;
            break;
            case "n":
                readdata = null;
            break;
            case "s":
                var ccount = read_until(data, dataoffset, ':');
                var chrs = ccount[0];
                var stringlength = ccount[1];
                dataoffset += chrs + 2;
                
                var readData = read_chrs(data, dataoffset+1, parseInt(stringlength));
                var chrs = readData[0];
                var readdata = readData[1];
                dataoffset += chrs + 2;
                if(chrs != parseInt(stringlength) && chrs != readdata.length){
                    error('SyntaxError', 'String length mismatch');
                }
            break;
            case "a":
                var readdata = {};
                
                var keyandchrs = read_until(data, dataoffset, ':');
                var chrs = keyandchrs[0];
                var keys = keyandchrs[1];
                dataoffset += chrs + 2;
                
                for(var i = 0;i < parseInt(keys);i++){
                    var kprops = _unserialize(data, dataoffset);
                    var kchrs = kprops[1];
                    var key = kprops[2];
                    dataoffset += kchrs;
                    
                    var vprops = _unserialize(data, dataoffset);
                    var vchrs = vprops[1];
                    var value = vprops[2];
                    dataoffset += vchrs;
                    
                    readdata[key] = value;
                }
                
                dataoffset += 1;
            break;
            default:
                error('SyntaxError', 'Unknown / Unhandled data type(s): ' + dtype);
            break;
        }
        return [dtype, dataoffset - offset, typeconvert(readdata)];
    };
    return _unserialize(data, 0)[2];
}

//return the value of the radio button that is checked
//return an empty string if none are checked, or
//there are no radio buttons
function getRadioButtonValue(radioObj) {
	if(!radioObj)
		return "";
	var radioLength = radioObj.length;
	if(radioLength == undefined)
		if(radioObj.checked)
			return radioObj.value;
		else
			return "";
	for(var i = 0; i < radioLength; i++) {
		if(radioObj[i].checked) {
			return radioObj[i].value;
		}
	}
	return "";
}

//set the radio button with the given value as being checked
//do nothing if there are no radio buttons
//if the given value does not exist, all the radio buttons
//are reset to unchecked
function setRadioButtonValue(radioObj, newValue) {
	if(!radioObj)
		return;
	var radioLength = radioObj.length;
	if(radioLength == undefined) {
		radioObj.checked = (radioObj.value == newValue.toString());
		return;
	}
	for(var i = 0; i < radioLength; i++) {
		radioObj[i].checked = false;
		if(radioObj[i].value == newValue.toString()) {
			radioObj[i].checked = true;
		}
	}
}