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 getEl(id){
  var el = document.getElementById(id);
//  if(!el){
//    alert("element " + id + " does not exist");
//  }
  return el;
}

function setEl(id, html, autoDisplay){
  var returnVal;  
  var el = getEl(id);
  
  if(el){
    el.innerHTML = html;
  }else{
  	return false;
  }
  
  if(autoDisplay){
  	if(html == ''){  		
  		return hideEl(id);
  	}else{
  		return showEl(id);
  	}
  }else{
  	return showEl(id);
  }
}

function toggleEl(id, suppressWarning){
  var el = getEl(id);
  if(el){
    if (el.style.display == 'none') {
      if(el.tagName == "SPAN" || el.tagName == "IMG"){
	      el.style.display = 'inline';
	      return 1; // 1 means its showing now
	  }else{
	      el.style.display = 'block';
	      return 1; // 1 means its showing now
	  }
    }else if (el.style.display == 'block' || el.style.display == 'inline' || el.style.display == '') {
      el.style.display = 'none';
	  return 0; // 0 means its hidden now
    }
  }else{
    return -1; // -1 means there was no element
  }
}


function showEl(id){
  var el = getEl(id);
  return _showEl(el);
}


function showElParent(id){
  var el = getElParent(id);
  return _showEl(el);
}

function _showEl(el){
  if(el){
      if(el.tagName == "SPAN" || el.tagName == "IMG"){
	      el.style.display = 'inline';
	  }else{
	      el.style.display = 'block';
	  }
	  return true;
  }else{
	  return false;
  }
}

function hideEl(id){
  var el = getEl(id);
  return _hideEl(el);
}

function hideElParent(id){
  var el = getElParent(id);
  return _hideEl(el);
}

function _hideEl(el){
  if(el){
  	el.style.display = 'none';
  	return true;
  }else{
	return false;
  }
}

function toggleEls(id1, id2){
	var first = toggleEl(id1);
	var second = toggleEl(id2);
	return false;
}

// simple ajax wrapper meant for SYNCHRONOUS ajax calls
function callAjax(url, params, getOrPost){
	if(!getOrPost) getOrPost = 'get';
	var myAjax = new Ajax.Request(
		url, { 
		method: getOrPost, 
		parameters: params,
//		evalScripts: true,
		asynchronous: false
		});
	return myAjax.transport.responseText;
}

function BrowserType() {
	var type = navigator.appName
	if (type=="Netscape") this.type = "ns"
	else if (type=="Microsoft Internet Explorer") this.type = "ie"
	else this.type = type
	this.version = parseInt(navigator.appVersion);
}

browser = new BrowserType()


function ConvertCharacters(strDoc, strConvertFrom, strConvertTo){
	var k, pos, strTemp;
	k=0;
	strTemp=strDoc;
	k = strDoc.indexOf(strConvertFrom, 0);
	while ((k < strDoc.length) && (k != -1)) {
		strTemp = strDoc.substring (0,k) + strConvertTo + strDoc.substring (parseInt(k) + parseInt(strConvertFrom.length), strDoc.length);
		if (k==strDoc.length - strConvertFrom.length){
			strDoc=strTemp;
			break;	
			}		
		else	
			pos=k + strConvertTo.length;

		strDoc=strTemp;
		k=strDoc.indexOf(strConvertFrom, pos);
	}
	strDoc=strTemp;
	return strDoc;
}


// this returns the style object for both browsers from the item name.
function returnStyleObj(itemName){

	//var ieAll = "";
	//var ieStyle = "";

	//if (browser.type != "ns"){
	//	ieAll = ".all";
	//	ieStyle = ".style";
	//}

	//return eval("document" + ieAll + "." + itemName + ieStyle);
	return document.getElementById(itemName).style;
}

function getCoordArrayFromCoordString(coordString){
	//parent.debug('debug1', 'getCoordArrayFromCoordString');
	var match = /^x(\d+)y(\d+)z(\d+)$/i.exec(coordString);
	return [match[1], match[2], match[3]];
}

function getTrackNumFromCoordString(movieCoords, coordString){
	var trackNum;
	movieCoords.each(function (coord, index){if(coord == coordString){trackNum = index;}});
	return trackNum;
}