function changePic(img_name) {
	var longstring = document[img_name].src;
	var brokenstring = longstring.split("/");
	var filename = brokenstring[brokenstring.length-1];
	
	if(filename=="unfold_unfolded.gif")
		document[img_name].src='./images/unfold_folded.gif';
	else if(filename=="unfold_folded.gif")
		document[img_name].src='./images/unfold_unfolded.gif';
}

function toggleFold(layer) {
	changePic('unfold'+layer);
	if(BrowserDetect.browser=="Explorer")
		Effect.toggle('div'+layer, 'appear', {duration:0.0} );
	else
		Effect.toggle('div'+layer, 'blind', {duration:0.5} );
}

var BrowserDetect = {
	init: function () {
		this.browser = this.searchString(this.dataBrowser) || "An unknown browser";
		this.version = this.searchVersion(navigator.userAgent)
			|| this.searchVersion(navigator.appVersion)
			|| "an unknown version";
		this.OS = this.searchString(this.dataOS) || "an unknown OS";
	},
	searchString: function (data) {
		for (var i=0;i<data.length;i++)	{
			var dataString = data[i].string;
			var dataProp = data[i].prop;
			this.versionSearchString = data[i].versionSearch || data[i].identity;
			if (dataString) {
				if (dataString.indexOf(data[i].subString) != -1)
					return data[i].identity;
			}
			else if (dataProp)
				return data[i].identity;
		}
	},
	searchVersion: function (dataString) {
		var index = dataString.indexOf(this.versionSearchString);
		if (index == -1) return;
		return parseFloat(dataString.substring(index+this.versionSearchString.length+1));
	},
	dataBrowser: [
		{ 	string: navigator.userAgent,
			subString: "OmniWeb",
			versionSearch: "OmniWeb/",
			identity: "OmniWeb"
		},
		{
			string: navigator.vendor,
			subString: "Apple",
			identity: "Safari"
		},
		{
			prop: window.opera,
			identity: "Opera"
		},
		{
			string: navigator.vendor,
			subString: "iCab",
			identity: "iCab"
		},
		{
			string: navigator.vendor,
			subString: "KDE",
			identity: "Konqueror"
		},
		{
			string: navigator.userAgent,
			subString: "Firefox",
			identity: "Firefox"
		},
		{
			string: navigator.vendor,
			subString: "Camino",
			identity: "Camino"
		},
		{		// for newer Netscapes (6+)
			string: navigator.userAgent,
			subString: "Netscape",
			identity: "Netscape"
		},
		{
			string: navigator.userAgent,
			subString: "MSIE",
			identity: "Explorer",
			versionSearch: "MSIE"
		},
		{
			string: navigator.userAgent,
			subString: "Gecko",
			identity: "Mozilla",
			versionSearch: "rv"
		},
		{ 		// for older Netscapes (4-)
			string: navigator.userAgent,
			subString: "Mozilla",
			identity: "Netscape",
			versionSearch: "Mozilla"
		}
	],
	dataOS : [
		{
			string: navigator.platform,
			subString: "Win",
			identity: "Windows"
		},
		{
			string: navigator.platform,
			subString: "Mac",
			identity: "Mac"
		},
		{
			string: navigator.platform,
			subString: "Linux",
			identity: "Linux"
		}
	]

};
BrowserDetect.init();

function updateResults(){
	var minimumOverlayHeight = 82;
	
	var objOverlay = document.getElementById("loading_white")
	var objCentralLayer = document.getElementById("central_layer");

	var heightPixels = objCentralLayer.offsetHeight - 50;
	if(heightPixels < minimumOverlayHeight)
		heightPixels = minimumOverlayHeight;
	objOverlay.style.height = heightPixels + "px";
	objOverlay.style.width = objCentralLayer.offsetWidth + "px";
	
	var posicioCentral = findPosition(objCentralLayer);
	
	objOverlay.style.top = posicioCentral[1];
	objOverlay.style.left = posicioCentral[0];
	
	new Effect.Appear('loading_white', { duration: 0.2, from: 0.0, to: 0.8 });
	
	var url = './ajax_results.php';
	var myAjax = new Ajax.Updater( {success:'central_layer'}, url, { onComplete:function(){ new Effect.Appear('central_layer');},method: 'post', parameters:Form.serialize('advanced_search_form') });
}

function findPosition( oElement ) {
  if( typeof( oElement.offsetParent ) != 'undefined' ) {
    for( var posX = 0, posY = 0; oElement; oElement = oElement.offsetParent ) {
      posX += oElement.offsetLeft;
      posY += oElement.offsetTop;
    }
    return [ posX, posY ];
  } else {
    return [ oElement.x, oElement.y ];
  }
}

function sendContactMail(){
	var url = './include/send_mail_contact.php';
	var myAjax = new Ajax.Updater( {success:'result_body'}, url, { method: 'post', parameters:Form.serialize('contact_form') });
}

function validateContact( errorMessage ) {
	if( (document.getElementById('email').value!="") && (document.getElementById('subject').value!="") && (document.getElementById('body').value!="") )
	{
		sendContactMail();
	}
	else
	{
		alert( errorMessage );
	}
}

function sendAdvertiseMail(){
	var url = './include/send_mail_advertise.php';
	var myAjax = new Ajax.Updater( {success:'result_body'}, url, { method: 'post', parameters:Form.serialize('advertise_form') });
}

function validateAdvertise( errorMessage ) {
	if( (document.getElementById('email').value!="") && (document.getElementById('name').value!="") && (document.getElementById('phone').value!="") )
	{
		sendAdvertiseMail();
	}
	else
	{
		alert( errorMessage );
	}
}

function showLightbox() {
    document.getElementById('over').style.display='block';
    document.getElementById('fade').style.display='block';
}

function hideLightbox() {
    document.getElementById('over').style.display='none';
    document.getElementById('fade').style.display='none';
}