var g_Ajax = null;
 var g_idleTimeout = 90 * 60 * 1000;
 var g_TrackingTimer;
 
 function currentTime() {
     var date = new Date();
     return date.getTime();
 }
 
 var g_timeStart = currentTime();
 var g_title = document.title.substring(0, 150);
 var g_referrer = document.referrer;
 var g_State = 0;
 
 function _getAjax() {
     obj = null;
     if (window.XMLHttpRequest) 
 	obj = new XMLHttpRequest();
     else if (window.ActiveXObject) {
     	    obj = new ActiveXObject("Microsoft.XMLHTTP")
 	    if (!obj) {
 		try {
 	    	    obj = new ActiveXObject("Msxml2.XMLHTTP");
 		} 
 		catch(e) {
 		    try {
 			obj = new ActiveXObject("Microsoft.XMLHTTP");
 		    } 
 		    catch(e) {
 			obj = null;
 		    }
 		}
 	    }
     }
     return obj;
 }
 
 function fetch( a_call ) {
     this.onload = a_call;
     this.a_ajax = _getAjax();
     this.attemp = 0;
     this.busy = false;
     this.onError = function( a_args ) {
 	this.attemp++;
 	this.busy = false; 
 	if ( this.attemp>=1 ) {
 	    //alert("Ошибка отправки данных на сервер! Возможно сервер не доступен! "+ a_args );
 	    this.a_ajax = null;
 	    return false;
 	}   
 	this.send( a_args );
     }
     this.send=function( a_args ) {
 	if ( this.busy )
 	    return false;
 	if ( !this.a_ajax )
 	    return false;
 	var self = this;
 	this.busy = true;    
 	try {
 	    this.a_ajax.open( 'POST', a_args.url , true);
 	    this.a_ajax.setRequestHeader("Content-type", "application/x-www-form-urlencoded");
 	    //this.a_ajax.setRequestHeader("Content-length", a_args.data.length);
 	    //this.a_ajax.setRequestHeader("Connection", "close");
 	} 
 	catch(e) {
 	    //this.onError( a_args );
 	    return false;
 	}
 	
 	this.a_ajax.onreadystatechange = function() {
 	    try {
 		if ( self.a_ajax.readyState == 4 ) {
 		    if ( self.a_ajax.status == 200 ) {
 			self.attemp = 0;
 			self.busy = false;
 			//alert( self.a_ajax.responseText );
 			if ( self.onload )    
 		    	    self.onload( self.a_ajax.responseText,self );        
 			else 
 		    	    eval( self.a_ajax.responseText );
 		    }	    
 		}	
 	    }
 	    catch(e) {
 		self.onError( e );
 		return false;
 	    }	
 	}    
 	try {
 	    self.a_ajax.send( a_args.data );
 	} 
 	catch(e) {
 	    //this.onError( a_args );
 	    return false;
 	} 		
     }	        
 };
 
 
 function openWnd(url,wnd_name,width,height,a_refresh,dontop ) {
 	var wnd=top[wnd_name];
 	if ( typeof(a_refresh)!='undefined' && wnd!=null) { 
 	    wnd.close();
 	    wnd = null;
 	}    
 	if ( wnd!=null && typeof(wnd)=='object' && typeof(wnd.document)!='undefined' && !wnd.closed ) {	
 	    if (wnd.document.location.href!=url  ) {
 		wnd.location.href=url;
 	    }
 	    wnd.focus();	
 	} else {
 		var wnd = window.open(url,wnd_name,'width='+width+',height='+height+',status=yes,menubar=no,resizable=yes,scrollbars=yes,left='+String((screen.width-width)/2)+',top='+String((screen.height-height)/2));
 		if (typeof(donttop) == 'undefined') {
 			top[wnd_name] = wnd;
 		}
 	}
 	return wnd;
 }
 function create( name, attributes ) {
     var el = document.createElement( name );
     if ( typeof(attributes) == 'object' ) {
 	for ( var i in attributes ) {
 	    var val = ( attributes[i]==null ) ? '' : attributes[i];	
 	    switch( i.toLowerCase() ) {
 		case 'class':
 	    	    el.className = val;  // for IE compatibility
 		break;
 		case 'style':
 		    if ( typeof(el.style.cssText)=='undefined' ) 
			el.setAttribute("style",val );
		    else
			el.style.cssText = val; // for IE compatibility
 		break;
 		case 'onchange':
 		    el.onchange = new Function( val );
 		break;
 		case 'onclick':
 		    el.onclick = new Function( val );
 		break;
 		    default:
 		el.setAttribute( i, val );
 		    break;
 		}
 	}    
     }
     for ( var i = 2; i<arguments.length; i++ ) {
 	var val = arguments[i];
 	if ( val == null )	
 	    val = '';
 	    if ( typeof(val) == 'string' ) { val = document.createTextNode( val ) };
 	    el.appendChild( val );
 	}
     return el;
}
function getStyle( el,prop ) {
    var r;
    if( window.getComputedStyle )  {
	r = window.getComputedStyle( el,null)[ prop ];
    } else if( el.currentStyle ) {
	r = el.currentStyle[ prop ];
    }
    return r;
}


function getDocumentHeight() 
{
    var _b = ( document.documentElement ) ? document.documentElement : document.body;
    var r = ( _b.scrollHeight > _b.offsetHeight) ? _b.scrollHeight: _b.offsetHeight;
    return r;
}
function getDocumentWidth()
{
    var _b = ( document.documentElement ) ? document.documentElement : document.body;
    return ( (_b.scrollWidth > _b.offsetWidth)?_b.scrollWidth:_b.offsetWidth );
}

function defineMargin( f,s,fnc,style ) {
    var l = getStyle( document.body,f );
    l = ( l =='auto' ) ? 0 : parseInt( l );
    
    if ( !l ) {
	var r = getStyle( document.body,'marginRight');
	r = ( r =='auto' ) ? 0 : parseInt( r );
	if ( !r ) 
	    l = ( parseInt( fnc() )  - parseInt( getStyle(document.body,style) ) ) /2;
	else 
	    l = ( parseInt( fnc() )-r -parseInt( getStyle(document.body,style) ) ) /2;
    }
    return (l>0) ? l : 0;
}

function mLeft() { return defineMargin( 'marginLeft','marginRight',getDocumentWidth,'width'); }
function mRight() { return defineMargin( 'marginRight','marginLeft',getDocumentWidth,'width'); }

function getClientWidth() {
    var rez = document.compatMode=='CSS1Compat' && !window.opera?document.documentElement.clientWidth:document.body.clientWidth;
    return parseInt(rez);
}
function getClientHeight() {
    var rez = document.compatMode=='CSS1Compat' && !window.opera?document.documentElement.clientHeight:document.body.clientHeight;
    return parseInt(rez);
}
function getBodyScrollTop() {
    return self.pageYOffset || (document.documentElement && document.documentElement.scrollTop) || (document.body && document.body.scrollTop);
}
function getBodyScrollLeft() {
    return self.pageXOffset || (document.documentElement && document.documentElement.scrollLeft) || (document.body && document.body.scrollLeft);
}
function getClientCenterX() {
    return getClientWidth()/2+getBodyScrollLeft() - mLeft();
}
function getClientCenterY() {
    return getClientHeight()/2+getBodyScrollTop();
}

function Dialog() {
     this._image = null;
     this._invite = null;
     this._dlg = null;
     this._shadow = null;
     this._nick = null;
     this._oldR = null;
     
     this.create = function() {
 	if ( this._dlg )
 	    return;
	this._shadow = create('div',{ style:"z-index:1010;display:none;position:absolute;top:0px;left:0px;background-color:#333;-moz-opacity:0.4;opacity:.40;filter:alpha(opacity=40);"});
 	this._dlg = create('div',{style:"width:402px;background:white; border:1px solid #000;padding:0px;z-index:1011;position:absolute;"},
 	    create('div',{ style:"background:blue;" },
 		create('b',{},
 		    create('font',{ color:"white" },'Приглашение!'))
 	    ),
 	    create('table',{width:"100%"},
 	     create('tbody',{},
 		create('tr',{},
 		    create('td',{width:"20%"},this._image = create('img',{id:"user_img",width:"200px"})),
 		    create('td',{width:"80%",style:"border:1px solid #000;vertical-align:top;height:100%;"},this._invite = create('div',{id:"_dlg_text"})) 
 		),
 		create('tr',{},
 		    create('td',{}),
 		    create('td',{align:"right"},'Ваше имя:',
 			this._nick = create('input',{type:"text",id:"_n",name:"_n"} )
 		    )
 		),
 		create('tr',{},
 		    create('td',{}),
 		    create('td',{align:"right"},
 			create('input',{type:"button",value:"Принять",onclick:"startSeans();"}),
 			create('input',{type:"button",value:"Отклонить",onclick:"cancelSeans();"})	
 		    )
 		)
 	     )
 	    ) 	    
 	);    
	document.body.appendChild( this._shadow );
 	document.body.appendChild( this._dlg );
     };
     this.test = function() {
 	if ( !this._dlg ) this.create();
     }
     this.setText = function ( a_text ) {
 	this.test();
 	this._invite.innerHTML = a_text;    
     }
     this.setImg = function( a_user_id ) {
 	this.test();
 	this._image.src= '/live-help/operator/userImg.php?user_id='+escape(a_user_id);
        this._image.style.width="150px";
     }
     this.center = function(){
 	this._dlg.style.left = getClientCenterX() - parseInt( this._dlg.offsetWidth )/2+'px';
 	this._dlg.style.top = getClientCenterY() - parseInt( this._dlg.offsetHeight )/2+'px';
     }
     this.show = function( a_show ) {
 	this.test();
 	this._dlg.style.display = ( a_show ) ? "block" : "none";
	this._shadow.style.display = ( a_show ) ? "block" : "none";
 	if ( a_show ) {
	    this.center();
	    this._shadow.style.left = -mLeft()+'px';
	    this._shadow.style.height = getDocumentHeight()+'px';
	    this._shadow.style.width = getDocumentWidth()+'px';
	    
	    this._oldR = window.onscroll;    
	    window.onscroll = doCenter;
 	}    
	else 
	    if ( this._oldR ) window.onscroll = this._oldR;
     }
     this.nickName = function() {
 	this.test();
 	return this._nick.value;
     }
 };
 
 function _setState( a_state )
 {
     if ( g_State == a_state )
 	return;
     g_State = a_state;
 }
 
 var _inviteDialog = new Dialog;
function doCenter() {
    _inviteDialog.center();
}
 
 function _initSeans( message,user_id ) {
     if ( g_State!=1 )	
 	return;
     _inviteDialog.show( true );
     _inviteDialog.setImg( user_id );
     _inviteDialog.setText( message );
     _setState(2);
 }
 function cancelSeans() {
     _inviteDialog.show( false );
     _setState( 3 );
     return false;
 }
 function startSeans() {
     var n = _inviteDialog.nickName();
     openWnd('/live-help/client/chat.php?nick='+encodeURIComponent(n),'addaccess',600,500,true );
     _inviteDialog.show( false );	
     _setState( 1 );
     return false;
 }
 function stopTracking() {
     g_Ajax.abort();
     g_Ajax = null;
 }
  function cookie() {
    var cookieEnabled=(navigator.cookieEnabled)? true : false
    
    //if not IE4+ nor NS6+
    if (typeof navigator.cookieEnabled=="undefined" && !cookieEnabled){ 
	document.cookie="testcookie"
	cookieEnabled=(document.cookie.indexOf("testcookie")!=-1)? true : false
    }
    return cookieEnabled;
 }

 function startAjaxTracking() {
     if ( !cookie() ) 
        return;
     RequestData = 'STATE='+escape(g_State);
     if ( !g_State ) 
     	RequestData = RequestData+'&TITLE=' + encodeURIComponent(g_title) + '&URL=' + escape(document.location) + '&REFERRER=' + escape(g_referrer);
 	
     g_Ajax.send({url:"/live-help/client/trackClient.php",data:RequestData});
     var l_time = currentTime();
     l_timeElapsed = l_time - g_timeStart;
     if ( l_timeElapsed < g_idleTimeout ) {
 	window.clearTimeout( g_TrackingTimer );
 	g_TrackingTimer = window.setTimeout('startAjaxTracking();', 3000 );
     }
 }
 g_Ajax = new fetch();
 startAjaxTracking();