function swapImg(id,imgsrc)
{
	var imgobj = document.getElementById(id);
	
	return imgobj.src = imgsrc;
}

function swapTxt(id, text)
{
	var txtobj = document.getElementById(id);
	return txtobj.innerHTML = text;
}


function switchPost(formid,action,target)
{
	var myform = document.getElementById(formid);
	
	myform.action=action
	if(target != undefined)
	{
		myform.target = target;
	}
	myform.submit();
	
}

function checkField(fieldname)
{
	var myfield = document.getElementById(fieldname);
	return (myfield.value == "" ? false : true);
}

function isNumeric(value)
{
	num = (100 * value);
	if(isNaN(num)== false)
	{
		return true;
	}
	else
	{ 
		return false;
	}
}

function isEmail(value)
{
	if(value.indexOf('@') == -1)
	{
		return false;
	}
	else
	{
		return true;
	}
}

function checkFormStep3_is()
{
	
	var name = document.getElementById('reg_name');
	var address = document.getElementById('reg_address');
	var city = document.getElementById('reg_city');
	var postcode = document.getElementById('reg_postcode');
	var country = document.getElementById('reg_country');
	var email = document.getElementById('reg_email');
	var password = document.getElementById('reg_password');
	var password_confirm = document.getElementById('reg_password_confirm');
	
	var user_name = document.getElementById('user_name');
	var user_pass = document.getElementById('user_pass');
	
	var error = "";
	
	var itemDisplay = document.getElementById('UserLogin');
	
	if(itemDisplay.style.display != '')
	{
		if(name.value == "")
		{
			error += "Nafn\n";
		}
		if(address.value == "")
		{
			error += "Heimilisfang\n";
		}
		if(city.value == "")
		{
			error += "Borg\n";
		}
		if(postcode.value == "")
		{
			error += "Póstnśmer\n";
		}
		if(country.value == "")
		{
			error += "Land\n";
		}
		if(email.value == "")
		{
			error += "Netfang\n";
		}
		else if(isEmail(email.value) == false)
		{
			error += "Netfang veršur aš vera gilt\n";
		}
		if(password.value == "")
		{
			error += "Lykilorš\n";
		}
		if(password_confirm.value == "")
		{
			error += "Stašfest lykilorš\n";
		}
		if(password.value != password_confirm.value)
		{
			error += "Lykilorš og lykilorš stašfest veršur aš vera eins\n";
		}
	}
	else
	{
		if(user_name.value == "")
		{
			error += "Žaš veršur aš setja inn notandanafn\n";	
		}
		else if(user_name.value.indexOf('@') == -1)
		{
			error += "Notandanafn veršur aš vera netfang\n";
		}
		if(user_pass.value == "")
		{
			error += "Žaš veršur aš setja inn lykilorš\n";
		}
	}
	
	if(error != "")
	{
		alert("Eftirfarandi atriši verša aš vera śtfyllt:\n"+error);
		return false;
	}
	else
	{
		return true;
	}
	
}

function checkFormStep3_en()
{
	
	var name = document.getElementById('reg_name');
	var address = document.getElementById('reg_address');
	var city = document.getElementById('reg_city');
	var postcode = document.getElementById('reg_postcode');
	var country = document.getElementById('reg_country');
	var email = document.getElementById('reg_email');
	var password = document.getElementById('reg_password');
	var password_confirm = document.getElementById('reg_password_confirm');
	
	var user_name = document.getElementById('user_name');
	var user_pass = document.getElementById('user_pass');
	
	var error = "";
	
	var itemDisplay = document.getElementById('UserLogin');
	
	if(itemDisplay.style.display != '')
	{
		if(name.value == "")
		{
			error += "Name\n";
		}
		if(address.value == "")
		{
			error += "Address\n";
		}
		if(city.value == "")
		{
			error += "City\n";
		}
		if(postcode.value == "")
		{
			error += "Zip code\n";
		}
		if(country.value == "")
		{
			error += "Country\n";
		}
		if(email.value == "")
		{
			error += "Email\n";
		}
		else if(isEmail(email.value) == false)
		{
			error += "Must be a valid email\n";
		}
		if(password.value == "")
		{
			error += "Password\n";
		}
		if(password_confirm.value == "")
		{
			error += "Password confirm\n";
		}
		if(password.value != password_confirm.value)
		{
			error += "Password and password confirm must be identical\n";
		}
	}
	else
	{
		if(user_name.value == "")
		{
			error += "Must fill out username\n";	
		}
		else if(user_name.value.indexOf('@') == -1)
		{
			error += "Username must be an emailaddress\n";
		}
		if(user_pass.value == "")
		{
			error += "Password must be set\n";
		}
	}
	
	if(error != "")
	{
		alert("The following items must be filled:\n"+error);
		return false;
	}
	else
	{
		return true;
	}
	
}

/*
	@author:	Helgi P - helgi@greind.is
	@date:		07.01.2008
	@desc:		Fall sem swapar style.display gildi į objectum skilgreind ķ obj1 og obj2
	@param:		STR obj1, STR obj2
	@return:	VOID
*/
function swapDisplay(obj1,obj2)
{
	var obj_1 = document.getElementById(obj1);
	var obj_2 = document.getElementById(obj2);
	
	if(obj_1.style.display == '')
	{
		obj_1.style.display = 'none';
		obj_2.style.display = '';
	}
	else
	{
		obj_1.style.display = '';
		obj_2.style.display = 'none';
	}
}


function checkForgottenPass()
{
	var email = document.getElementById('email');
	var error = "";
	
	if(email.value == "")
	{
		error += "Žaš veršur aš setja inn eitthvaš netfang.\n";
	}
	else if(email.value.indexOf('@') == -1)
	{
		error += "Žaš veršur aš setja inn gilt netfang.\n";
	}
	
	if(error != "")
	{
		alert(error);
		return false;
	}
	else
	{
		return true;
	}
}

function setSessionAjax(variable,value)
{
	xmlhttpPost('ajax.php?var='+variable+'&value='+value);
}


// AJAX
function xmlhttpPost(strURL) {
	 var xmlHttpReq = false;
    var self = this;
    // Mozilla/Safari
    if (window.XMLHttpRequest) {
        self.xmlHttpReq = new XMLHttpRequest();
    }
    // IE
    else if (window.ActiveXObject) {
        self.xmlHttpReq = new ActiveXObject("Microsoft.XMLHTTP");
    }
    self.xmlHttpReq.open('POST', strURL, true);
    self.xmlHttpReq.setRequestHeader('Content-Type', 'application/x-www-form-urlencoded');
    self.xmlHttpReq.onreadystatechange = function() {
	    if (self.xmlHttpReq.readyState == 4) {
	    	//update(self.xmlHttpReq.responseText);
	    }
    }
    self.xmlHttpReq.send(strURL);
}

function calcEventPrice()
{
	var persons = document.getElementById('persons');
	var price = document.getElementById('pricetag');
	
	if(persons.value < 1)
	{
		persons.value = 1;
	}
	
	var totalprice = persons.value * price.value;
	var pricetag = document.getElementById('totalprice');
	
	pricetag.innerHTML = " EUR "+totalprice;
}


function get_html_translation_table (table, quote_style) {
    // Returns the internal translation table used by htmlspecialchars and htmlentities  
    // 
    // version: 909.322
    // discuss at: http://phpjs.org/functions/get_html_translation_table    // +   original by: Philip Peterson
    // +    revised by: Kevin van Zonneveld (http://kevin.vanzonneveld.net)
    // +   bugfixed by: noname
    // +   bugfixed by: Alex
    // +   bugfixed by: Marco    // +   bugfixed by: madipta
    // +   improved by: KELAN
    // +   improved by: Brett Zamir (http://brett-zamir.me)
    // +   bugfixed by: Brett Zamir (http://brett-zamir.me)
    // +      input by: Frank Forte    // +   bugfixed by: T.Wild
    // +      input by: Ratheous
    // %          note: It has been decided that we're not going to add global
    // %          note: dependencies to php.js, meaning the constants are not
    // %          note: real constants, but strings instead. Integers are also supported if someone    // %          note: chooses to create the constants themselves.
    // *     example 1: get_html_translation_table('HTML_SPECIALCHARS');
    // *     returns 1: {'"': '&quot;', '&': '&amp;', '<': '&lt;', '>': '&gt;'}
    
    var entities = {}, hash_map = {}, decimal = 0, symbol = '';    var constMappingTable = {}, constMappingQuoteStyle = {};
    var useTable = {}, useQuoteStyle = {};
    
    // Translate arguments
    constMappingTable[0]      = 'HTML_SPECIALCHARS';    constMappingTable[1]      = 'HTML_ENTITIES';
    constMappingQuoteStyle[0] = 'ENT_NOQUOTES';
    constMappingQuoteStyle[2] = 'ENT_COMPAT';
    constMappingQuoteStyle[3] = 'ENT_QUOTES';
     useTable       = !isNaN(table) ? constMappingTable[table] : table ? table.toUpperCase() : 'HTML_SPECIALCHARS';
    useQuoteStyle = !isNaN(quote_style) ? constMappingQuoteStyle[quote_style] : quote_style ? quote_style.toUpperCase() : 'ENT_COMPAT';
 
    if (useTable !== 'HTML_SPECIALCHARS' && useTable !== 'HTML_ENTITIES') {
        throw new Error("Table: "+useTable+' not supported');        // return false;
    }
 
    entities['38'] = '&amp;';
    if (useTable === 'HTML_ENTITIES') {        entities['160'] = '&nbsp;';
        entities['161'] = '&iexcl;';
        entities['162'] = '&cent;';
        entities['163'] = '&pound;';
        entities['164'] = '&curren;';        entities['165'] = '&yen;';
        entities['166'] = '&brvbar;';
        entities['167'] = '&sect;';
        entities['168'] = '&uml;';
        entities['169'] = '&copy;';        entities['170'] = '&ordf;';
        entities['171'] = '&laquo;';
        entities['172'] = '&not;';
        entities['173'] = '&shy;';
        entities['174'] = '&reg;';        entities['175'] = '&macr;';
        entities['176'] = '&deg;';
        entities['177'] = '&plusmn;';
        entities['178'] = '&sup2;';
        entities['179'] = '&sup3;';        entities['180'] = '&acute;';
        entities['181'] = '&micro;';
        entities['182'] = '&para;';
        entities['183'] = '&middot;';
        entities['184'] = '&cedil;';        entities['185'] = '&sup1;';
        entities['186'] = '&ordm;';
        entities['187'] = '&raquo;';
        entities['188'] = '&frac14;';
        entities['189'] = '&frac12;';        entities['190'] = '&frac34;';
        entities['191'] = '&iquest;';
        entities['192'] = '&Agrave;';
        entities['193'] = '&Aacute;';
        entities['194'] = '&Acirc;';        entities['195'] = '&Atilde;';
        entities['196'] = '&Auml;';
        entities['197'] = '&Aring;';
        entities['198'] = '&AElig;';
        entities['199'] = '&Ccedil;';        entities['200'] = '&Egrave;';
        entities['201'] = '&Eacute;';
        entities['202'] = '&Ecirc;';
        entities['203'] = '&Euml;';
        entities['204'] = '&Igrave;';        entities['205'] = '&Iacute;';
        entities['206'] = '&Icirc;';
        entities['207'] = '&Iuml;';
        entities['208'] = '&ETH;';
        entities['209'] = '&Ntilde;';        entities['210'] = '&Ograve;';
        entities['211'] = '&Oacute;';
        entities['212'] = '&Ocirc;';
        entities['213'] = '&Otilde;';
        entities['214'] = '&Ouml;';        entities['215'] = '&times;';
        entities['216'] = '&Oslash;';
        entities['217'] = '&Ugrave;';
        entities['218'] = '&Uacute;';
        entities['219'] = '&Ucirc;';        entities['220'] = '&Uuml;';
        entities['221'] = '&Yacute;';
        entities['222'] = '&THORN;';
        entities['223'] = '&szlig;';
        entities['224'] = '&agrave;';        entities['225'] = '&aacute;';
        entities['226'] = '&acirc;';
        entities['227'] = '&atilde;';
        entities['228'] = '&auml;';
        entities['229'] = '&aring;';        entities['230'] = '&aelig;';
        entities['231'] = '&ccedil;';
        entities['232'] = '&egrave;';
        entities['233'] = '&eacute;';
        entities['234'] = '&ecirc;';        entities['235'] = '&euml;';
        entities['236'] = '&igrave;';
        entities['237'] = '&iacute;';
        entities['238'] = '&icirc;';
        entities['239'] = '&iuml;';        entities['240'] = '&eth;';
        entities['241'] = '&ntilde;';
        entities['242'] = '&ograve;';
        entities['243'] = '&oacute;';
        entities['244'] = '&ocirc;';        entities['245'] = '&otilde;';
        entities['246'] = '&ouml;';
        entities['247'] = '&divide;';
        entities['248'] = '&oslash;';
        entities['249'] = '&ugrave;';        entities['250'] = '&uacute;';
        entities['251'] = '&ucirc;';
        entities['252'] = '&uuml;';
        entities['253'] = '&yacute;';
        entities['254'] = '&thorn;';        entities['255'] = '&yuml;';
    }
 
    if (useQuoteStyle !== 'ENT_NOQUOTES') {
        entities['34'] = '&quot;';    }
    if (useQuoteStyle === 'ENT_QUOTES') {
        entities['39'] = '&#39;';
    }
    entities['60'] = '&lt;';    entities['62'] = '&gt;';
 
 
    // ascii decimals to real symbols
    for (decimal in entities) {        symbol = String.fromCharCode(decimal);
        hash_map[symbol] = entities[decimal];
    }
    
    return hash_map;
}

function htmlentities (string, quote_style) {
    // Convert all applicable characters to HTML entities  
    // 
    // version: 909.322
    // discuss at: http://phpjs.org/functions/htmlentities    // +   original by: Kevin van Zonneveld (http://kevin.vanzonneveld.net)
    // +    revised by: Kevin van Zonneveld (http://kevin.vanzonneveld.net)
    // +   improved by: nobbler
    // +    tweaked by: Jack
    // +   bugfixed by: Onno Marsman    // +    revised by: Kevin van Zonneveld (http://kevin.vanzonneveld.net)
    // +    bugfixed by: Brett Zamir (http://brett-zamir.me)
    // +      input by: Ratheous
    // -    depends on: get_html_translation_table
    // *     example 1: htmlentities('Kevin & van Zonneveld');    // *     returns 1: 'Kevin &amp; van Zonneveld'
    // *     example 2: htmlentities("foo'bar","ENT_QUOTES");
    // *     returns 2: 'foo&#039;bar'
    var hash_map = {}, symbol = '', tmp_str = '', entity = '';
    tmp_str = string.toString();    
    if (false === (hash_map = this.get_html_translation_table('HTML_ENTITIES', quote_style))) {
        return false;
    }
    hash_map["'"] = '&#039;';    for (symbol in hash_map) {
        entity = hash_map[symbol];
        tmp_str = tmp_str.split(symbol).join(entity);
    }
        return tmp_str;
}