var QSPR = function() {};

QSPR.Ajax = function(url)
{
	this.url = url;
	this.dataType = "json";
	
	this.send = function(params)
	{
		if (!params.error)
			params.error = this.onError;
		if (!params.success)
			params.success = this.onSuccess;
		if (!this.owner)
			this.owner = this;
		var url = (params.url != undefined) ? params.url : this.url;
		var self = this;
		var wrappedSuccess = function(xml)
		{
			if ($(xml).find('message').attr('type') == "exception")
				params.error.call(self.owner, $(xml).find('message').attr('title'));
			else
				params.success.call(self.owner, xml);
		}
		
		var wrappedError = function(xml)
		{
			params.error.call(self.owner, xml);
		}
		
		$.ajax
		(
			{ 
				type: 'POST', 
				url: url, 
				data: "xml=model&"+params.data,
				dataType: self.dataType, 
				success: wrappedSuccess,
				error: wrappedError
			}
		);
	}
	
	this.onError = function(message)
	{
		if (!message)
			message = "";
		if (message instanceof Object)
			window.alert("Request to server failed");
		else if (message == "")
			window.alert('Error occured while executing this action');
		else
			window.alert(message);
	}
	
}

function include_js(script_filename) 
{
    var html_doc = document.getElementsByTagName('head').item(0);
    var js = document.createElement('script');
    js.setAttribute('language', 'javascript');
    js.setAttribute('type', 'text/javascript');
    js.setAttribute('src', script_filename);
    html_doc.appendChild(js);
    return false;
}

function resizeOuterTo(w,h) 
{
 if (parseInt(navigator.appVersion)>3) {
   if (navigator.appName=="Netscape") {
    top.outerWidth=w;
    top.outerHeight=h;
   }
   else top.resizeTo(w,h);
 }
}

function getWikiUrl(str)
{
	if (str != undefined)
		return str.replace(/[ \.]/g, "_")
}

function getFilter(name)
{
	return $('[@filter][@name="'+name+'"]').attr('value');
}

	var getParams = new Array(); 
  
  	// Parse GET params
	function retrieveGETqs() 
	{ 
	    var query = window.location.search.substring(1); 
	    var parms = query.split('&'); 
	    for (var i=0; i<parms.length; i++) { 
	        var pos = parms[i].indexOf('='); 
	        if (pos > 0) { 
	            var key = parms[i].substring(0,pos); 
	            var val = parms[i].substring(pos+1); 
	            getParams[key] = val; 
	        } 
	    } 
	}
	retrieveGETqs();
	
function URLEncode(plaintext)
{
	// 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 = "";
	for (var i = 0; i < plaintext.length; i++ ) {
		var ch = plaintext.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;
};

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

function clone(myObj)
{
	if(typeof(myObj) != 'object') return myObj;
	if(myObj == null) return myObj;

	var myNewObj = new Object();

	for(var i in myObj)
		myNewObj[i] = clone(myObj[i]);

	return myNewObj;
}

function array(val)
{
	if (val == undefined)
		return new Array();
	if (!val.length)
		return new Array(val);
	return val;
}

if (window.focus) 
	window.focus();

String.prototype.trim = function() {
	return this.replace(/^\s+|\s+$/g,"");
}
String.prototype.ltrim = function() {
	return this.replace(/^\s+/,"");
}
String.prototype.rtrim = function() {
	return this.replace(/\s+$/,"");
}