var GsAjaxIds='';

var Try = {
	these: function()
	{
		var returnValue;

		for(var i=0; i<arguments.length; i++)
		{
			var lambda = arguments[i];
			try
			{
				returnValue = lambda();
				break;
			}
			catch(e) { }
		}
		return returnValue;
	}
} // Try

// SHORT FOR getElementById()
function $_(element)
{
	if(arguments.length>1)
	{
		for(var i=0, elements=[], length=arguments.length; i<length; i++) elements.push($_(arguments[i]));
		return elements;
	}
	if(typeof element == 'string') element = document.getElementById(element);
	
	return element;
} // $

function AjaxTransport()
{
	return Try.these(
		function() { return new ActiveXObject('Msxml2.XMLHTTP'); },
		function() { return new ActiveXObject('Microsoft.XMLHTTP'); },
		function() { return new XMLHttpRequest(); }
	) || false;
} // AjaxTransport

function AjaxUpdate(Url, LoadContainer, ContentContainerOrCallBack, GsAjaxPostContentArray, CallBackParameter)
{
//	alert("Url:" + Url)
	var RequestSuccess = false;
	try
	{
		var AjaxTransportUpdate = AjaxTransport();
		if(AjaxTransportUpdate)
		{
			var UrlParameters = 'Ajax=True';
			if(typeof(GsAjaxPostContentArray) == 'object')
			{
				for(var key in GsAjaxPostContentArray)
				{
					if(key == "Method")
						var keyMethod = GsAjaxPostContentArray[key];
//					alert(key +'=' + GsAjaxPostContentArray[key] +'('+typeof(GsAjaxPostContentArray[key])+')');
					UrlParameters+='&'+key+'='+escape_utf8(GsAjaxPostContentArray[key]);
				}
					
			}
		    AjaxTransportUpdate.open('POST', Url, true);
		    AjaxTransportUpdate.setRequestHeader('Content-Type', 'application/x-www-form-urlencoded; charset=UTF-8');

			if(typeof(LoadContainer) == 'object')
			{
				LoadContainer.style.display = 'block';
			}
			if(typeof(ContentContainerOrCallBack) == 'object') ContentContainerOrCallBack.innerHTML = '';
										
		    AjaxTransportUpdate.onreadystatechange = function()
			{
		        if(AjaxTransportUpdate.readyState == 4)
				{
					var ResponseContent = AjaxTransportUpdate.responseText;
					
					if(typeof(LoadContainer) == 'object' && (keyMethod != "Get" || keyMethod != "Edit"))
					{
						//LoadContainer.style.display = 'none';
					}
					if(typeof(ContentContainerOrCallBack) == 'function')
					{
						ContentContainerOrCallBack(ResponseContent, AjaxTransportUpdate.status, CallBackParameter);
					}
					else if(typeof(ContentContainerOrCallBack) == 'object')
					{
						if(ContentContainerOrCallBack.tagName.toLowerCase()  == "textarea")
							ContentContainerOrCallBack.value = ResponseContent.replace(/(<([^>]+)>)/ig,"");
						else
							ContentContainerOrCallBack.innerHTML = ResponseContent;

						EvalContentScripts(ResponseContent);
					}
				}
		    }
		    AjaxTransportUpdate.send(UrlParameters);
			RequestSuccess = true;
		}
	}
	catch(ex)
	{
		alert("AjaxUpdate error:\n"+ex);
	}
	
	return RequestSuccess;
} // AjaxUpdate

function EvalContentScripts(ContentHtml)
{
	if(ContentHtml)
	{
		var ScriptRegExp = new RegExp('(?:<script[^>]*>)((\n|\r|.)*?)(?:<\/script>)', 'img');
		var ScriptMatches=ContentHtml.match(ScriptRegExp);

		if ( ScriptMatches )
		{
			for(var i=0; i<ScriptMatches.length; i+=1 )
			{
				var EvalContent=ScriptMatches[i].replace(/<\/?script[^>]*>/gi, '');
				setTimeout(EvalContent, 0);
			}
		}
	}
} // EvalScripts

document.getElementsByClassName = function(className, parentElement)
{
	var children = ($_(parentElement) || document.body).getElementsByTagName('*');
	var elements = [], child;
	for(var i=0, length=children.length; i<length; i++)
	{
		child = children[i];
		if(child.className == className ) elements[elements.length] = child;
	}
	
	return elements;
} // getElementsByClassName


// Method for UTF-8 encoding
function escape_utf8(text) {
	return URLEncode(encode_utf8(text));
} // escape_utf8

function encode_utf8(text) {
	var utftext = "";
	if ( text ) {
		for (var n=0; n < text.length; n++) {
			var c=text.charCodeAt(n);
			
			if (c < 128) {
				utftext += String.fromCharCode(c);
			} else if((c > 127) && (c < 2048)) {
				utftext += String.fromCharCode((c >> 6) | 192);
				utftext += String.fromCharCode((c & 63) | 128);
			} else {
				utftext += String.fromCharCode((c >> 12) | 224);
				utftext += String.fromCharCode(((c >> 6) & 63) | 128);
				utftext += String.fromCharCode((c & 63) | 128);
			}
		}
	}
	
	return utftext;
} // encode_utf8

function unescape_utf8(text) {
	return decode_utf8(URLDecode(text));
} // unescape_utf8

// Method for UTF-8 decoding
function decode_utf8(text) {
	var string = "";
	var i=0;
	var c=c1=c2=0;
	if ( text ) {
		while ( i < text.length ) {
			c=text.charCodeAt(i);
			
			if (c < 128) {
				string+=String.fromCharCode(c);
				i+=1;
			} else if((c > 191) && (c < 224)) {
				c2=text.charCodeAt(i+1);
				string += String.fromCharCode(((c & 31) << 6) | (c2 & 63));
				i+=2;
			} else {
				c2=text.charCodeAt(i+1);
				c3=text.charCodeAt(i+2);
				string += String.fromCharCode(((c & 15) << 12) | ((c2 & 63) << 6) | (c3 & 63));
				i+=3;
			}
		}
	}
	return string;
} // decode_utf8

function URLEncode(text) {
	// The Javascript escape and unescape functions do not correspond
	// with what browsers actually do...
	var SAFECHARS = "0123456789" +					// Numeric
					"ABCDEFGHIJKLMNOPQRSTUVWXYZ" +	// Alphabetic
					"abcdefghijklmnopqrstuvwxyz" +
					"-_.!~*'()";					// RFC2396 Mark characters
	var HEX = "0123456789ABCDEF";

	var encoded = "";
	if ( typeof(text)=='string' ) {
		for ( var i=0; i<text.length; i+=1 ) {
			var ch=text.charAt(i);
		    if (ch==" ") {
			    encoded += "+";				// x-www-urlencoded, rather than %20
			} else if (SAFECHARS.indexOf(ch) != -1) {
			    encoded += ch;
			} else {
			    var charCode = ch.charCodeAt(0);
				if (charCode > 255) {
				    alert( "Unicode Character '" 
	                        + ch 
	                        + "' cannot be encoded using standard URL encoding.\n" +
					          "(URL encoding only supports 8-bit characters.)\n" +
							  "A space (+) will be substituted." );
					encoded += "+";
				} else {
					encoded += "%";
					encoded += HEX.charAt((charCode >> 4) & 0xF);
					encoded += HEX.charAt(charCode & 0xF);
				}
			}
		} // for
	}
	return encoded;
} // URLEncode

function URLDecode(encoded) {
   // Replace + with ' '
   // Replace %xx with equivalent character
   // Put [ERROR] in output if %xx is invalid.
   var HEXCHARS = "0123456789ABCDEFabcdef"; 
   var text = "";
   if ( typeof(encoded)=='string' ) {
	   var i = 0;
	   while (i < encoded.length) {
	       var ch = encoded.charAt(i);
		   if (ch == "+") {
		       text += " ";
			   i++;
		   } else if (ch == "%") {
				if (i < (encoded.length-2) 
						&& HEXCHARS.indexOf(encoded.charAt(i+1)) != -1 
						&& HEXCHARS.indexOf(encoded.charAt(i+2)) != -1 ) {
					text += unescape( encoded.substr(i,3) );
					i += 3;
				} else {
					alert( 'Bad escape combination near ...' + encoded.substr(i) );
					text += "%[ERROR]";
					i++;
				}
			} else {
			   text += ch;
			   i++;
			}
		} // while
	}
	return text;
} // URLDecode

function GsAjaxInit(ajaxId) {
	if (GsAjaxIds!='') GsAjaxIds+=',';
	GsAjaxIds+=ajaxId;
}

function GsInitAjaxOnLoad() {
	if (GsAjaxIds!='') {
		var GsAjaxIdArray = GsAjaxIds.split(',');
		for (i=0;i<GsAjaxIdArray.length;i++) {
			ajaxUrl = eval('GsAjax'+GsAjaxIdArray[i]+'Source');
			AjaxUpdate(ajaxUrl,'',GsAjaxCallBack,{'id':GsAjaxIdArray[i]},{'GsAjaxLayer':new String('GsAjax'+GsAjaxIdArray[i])});
		}
	}
}

function GsAjaxUpdate(GsAjaxId, GsAjaxParameters, GsAjaxCallbackFunctionName) {
	ajaxUrl = eval('GsAjax'+GsAjaxId+'Source');
	if (GsAjaxParameters!=null) {
		GsAjaxParameters['id'] = GsAjaxId;
		GsAjaxParameters['GsAjaxLayer']=new String('GsAjax'+GsAjaxId);
	} else {
		GsAjaxParameters = new Array();
		GsAjaxParameters['id'] = GsAjaxId;
		GsAjaxParameters['GsAjaxLayer']=new String('GsAjax'+GsAjaxId);
	}
	GsAjaxCallBackParameters = new Array();
	GsAjaxCallBackParameters['GsAjaxLayerId'] = new String(GsAjaxId);
	GsAjaxCallBackParameters['GsAjaxLayer'] = new String('GsAjax'+GsAjaxId);
	if (GsAjaxCallbackFunctionName!='' && GsAjaxCallbackFunctionName!=null) {
		GsAjaxCallBackParameters['GsCallbackFunction'] = new String(GsAjaxCallbackFunctionName);
	}
	AjaxUpdate(ajaxUrl,'',GsAjaxCallBack,GsAjaxParameters,GsAjaxCallBackParameters);
}

function GsAjaxCallBack(ResponseContent, AjaxStatus, CallBackParameter) {
	document.getElementById(CallBackParameter['GsAjaxLayer']).innerHTML=ResponseContent;
	if (CallBackParameter['GsCallbackFunction']!=null && CallBackParameter['GsCallbackFunction']!='') {
		eval(CallBackParameter['GsCallbackFunction']+'(\'GsAjax'+CallBackParameter['GsAjaxLayerId']+'\')');
	}
}

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

addLoadEvent(GsInitAjaxOnLoad);