/*
Common functions
@author Filatov Dmitry
@date   22.08.2006
*/

var Common = {

	// Common classes methods
	
	Class : {
		
		match : function(	
			oElement,
			sClassName
			) {
	
			if(!oElement) return;
			return oElement.className && oElement.className.match(new RegExp('(^|\\s+)' + sClassName + '($|\\s+)'));	
		
		},
		
		add : function(
			oElement,
			sClassName
			) {

			if(!oElement) return;
			if(!Common.Class.match(oElement, sClassName)) {
				oElement.className += ' ' + sClassName;
			}
			
		},
		
		replace : function(
			oElement,
			sClassNameFrom,
			sClassNameTo
			) {
			if(!oElement) return;
			oElement.className = ( oElement.className.replace( new RegExp("(^|\\s+)(" + sClassNameFrom + "|" + sClassNameTo + ")($|\\s+)", "g"), "$1" ) + ' ' + sClassNameTo ).replace( /^\s+/, '' );
			
		},
		
		remove : function(
			oElement,
			sClassName
			) {
	
			if(!oElement) return;
			oElement.className = oElement.className.replace(new RegExp('(.*)(^|\\s+)(' + sClassName + ')($|\\s+)(.*)'), '$1$4$5').replace(/(^)\s/, '$1');	
			
		}
		
	},
		
	
	// Common event's methods
	
	Event : {
	
		add : function(
			oElement,
			sEventType,
			fEventFunc,
			bCapture
			) {
					
			if(oElement.addEventListener) {
				oElement.addEventListener(
					sEventType,
					fEventFunc,
					bCapture? true : false
					);
			}
			else if(oElement.attachEvent) {
				oElement.attachEvent(
					'on' + sEventType,
					fEventFunc
					);
			}
	
		},		

		remove : function(
			oElement,
			sEventType,
			fEventFunc,
			bCapture
			) {
	
			if(oElement.removeEventListener) {
				oElement.removeEventListener(
					sEventType,
					fEventFunc,
					bCapture? true : false
					);
			}
			else if(oElement.detachEvent) {
				oElement.detachEvent(
					'on' + sEventType,
					fEventFunc
					);
			}
			
		},
		
		getAbsoluteCoords : function(oEvent) {

			var oCoords = {
				iLeft : 0,
				iTop  : 0
			};

			if(oEvent.pageX) {
  
				oCoords.iLeft = oEvent.pageX;
				oCoords.iTop = oEvent.pageY;
		
			}
			else {
	
				oCoords.iLeft = oEvent.clientX + document.body.scrollLeft - document.body.clientLeft;
				oCoords.iTop = oEvent.clientY + document.body.scrollTop - document.body.clientTop;

				if(document.body.parentElement && document.body.parentElement.clientLeft) {
		
					var bodyParent = document.body.parentElement;
		
					oCoords.iLeft += bodyParent.scrollLeft - bodyParent.clientLeft;
					oCoords.iTop += bodyParent.scrollTop - bodyParent.clientTop;  
			
				}
		
			}

			return oCoords;
			
		}
		
	},	
	
	
	// Common cookie's methods
	
	Cookie : {
	
		set : function(sName, sValue, sExpire, sPath) {
		
			document.cookie = sName + '=' + escape(sValue)
				+ ((sExpire == null)? '' : ('; expires=' + sExpire.toGMTString()))
				+ ((sPath == null)? '' : ('; path=' + sPath));
		
		},
		
		get : function(sName) {
		
			var sSearch = sName + '=';
			
			if(document.cookie.length > 0) {
			
				var iOffset = document.cookie.indexOf(sSearch);
				
				if(iOffset != -1) {
				
					iOffset += sSearch.length;
			
					var iEnd = document.cookie.indexOf(';', iOffset);
			
					if(iEnd == -1) {
						iEnd = document.cookie.length;
					}
					
					return unescape(document.cookie.substring(iOffset, iEnd));
					
				}
			}
			
			return '';			
		
		}
	
	},
	
	
	// Common xml's methods
	
	Xml : {
	
		NODE_ELEMENT : 1,
		NODE_TEXT    : 3,
		
		toString : function(oNode) {					
			
			var
				sXml = '',
				oChild
				;
			
			for(var i = 0; i < oNode.childNodes.length; i++) {
			
				oChild = oNode.childNodes[i];
			
				switch(oChild.nodeType) {
				
					case Common.Xml.NODE_ELEMENT: 
						
						sXml += '<' + oChild.nodeName;
						
						for(var j = 0; j < oChild.attributes.length; j++) {								
							if(oChild.attributes[j].nodeValue) {
								sXml += ' ' + oChild.attributes[j].nodeName + '="' + oChild.attributes[j].nodeValue + '"';
							}
						}
						
						if(oChild.childNodes.length > 0) {
						
							sXml += '>';
						
							sXml += Common.Xml.getString(oChild);
							
							sXml += '</' + oChild.nodeName + '>';
							
						}
						else {
						
							sXml += ' />';
						
						}						
											
					break;
										
					case Common.Xml.NODE_TEXT: 
					
						sXml += oChild.nodeValue;
					
					break;
					
					default:
					break;
				
				}
			
			}
		
			return sXml;
		
		},
		
		toArray : function(oNode) {
		
			var aValue = [];
			
			for(var i = 0; i < oNode.attributes.length; i++) {
			
				oChild = oNode.attributes[i];
								
				aValue[oChild.nodeName] = oChild.nodeValue;				

			}
			
			for(var i = 0; i < oNode.childNodes.length; i++) {
			
				oChild = oNode.childNodes[i];
				
				if(oChild.nodeType == Common.Xml.NODE_ELEMENT) {					
					aValue[oChild.nodeName] = Common.Xml.toString(oChild);
				}

			}						
			
			return aValue;
		
		}
	
	},


	// Common object's methods

	Object : {
				
		extend : function(
			oSource,
			oDestination
			) {				
		
			for(var i in oSource) {		
				oDestination[i] = oSource[i];
			}
		
			return oDestination;
		
		}
		
	},


	Utils : {
	
		oPopupDefaults : {	
	
			iWidth      : 540,
			iHeight     : 600,
			sToolbar    : 'no',
			sMenubar    : 'no',
			sResizeable : 'yes',
			sScrollbars : 'yes',
			sStatus     : 'yes'
	
		},
	
		popup : function(
			sUrl,
			sName,
			oOptions,
			bReplace
			) {
		
			oOptions = this.extend(
				oOptions,
				this.oPopupDefaults
				);
		
			var iLeftOffset = screen.availWidth / 2 - oOptions.iWidth / 2;
			var iTopOffset = screen.availHeight / 2 - oOptions.iHeight / 2;			
		
			oNewWindow = window.open(
				sUrl,
				sName,
				'left=' + iLeftOffset + ', ' +
				'top = ' + iTopOffset + ', ' +
				'width=' + oOptions.iWidth + ', ' +
				'height=' + oOptions.iHeight + ', ' +
				'resizable=' + oOptions.sResizeable + ', ' +
				'toolbar=' + oOptions.sToolbar + ', ' +
				'scrollbars=' + oOptions.sScrollbars + ', ' +
				'status=' + oOptions.sStatus
				);
			
			if(sUrl.match(/\.(gif|jpe?g|png)$/i)) {
		
				oNewWindow.document.open();
			
				oNewWindow.document.write('<html><head></head>' +
					'<body style="background: #FFF; margin: 0px; padding: 0px;">' +
					'<table cellpadding="0" cellspacing="0" border="0" width="100%" height="100%"><tr><td align="center">' + 
					'<img src="' + sUrl + '" </td></tr></table></body></html>'
					);
				
				oNewWindow.document.close();
		
			}
			
			oNewWindow.focus();				

			return false;
			
		},
		
		generateUid : function() {
	
			var sUid = '';
	
			for(var i = 0; i < 4; i++) {	
				sUid += (i > 0? '-' : '') + Math.floor(Math.random() * 9999);	
			}	
	
			return sUid;
		
		}
		
	}

}