var RightContext={
    TYPE_MENU:0,
    TYPE_TEXT:1,
    TYPE_TEXT_EXT:2,
    TYPE_SEPERATOR:3,
    TYPE_ATTRIBUTES:4,
    menuTriggerEvent:"RIGHT",
    mousePos:{x:0,y:0},
    rightOffset:-15,
    allowedContexts:["a","div","span","input"],
    menuCollection:new Object(),
    contextMenu:null,
    isShowing:false,
    abortKill:false,
    images:new Object(),
    req:null,
    initialize:function(){
        this.attachContextEvents();
    },
    addMenu:function(n,m){
        this.menuCollection[n]=m;
    },
    getMenu:function(n){
        return this.menuCollection[n];
    },
    attachContextEvents:function(){
        var tagContext,thisTag;
        for(var t=0;t<this.allowedContexts.length;t++){
            tags=document.getElementsByTagName(this.allowedContexts[t]);
            for(e=0;e<tags.length;e++){
                thisTag=tags[e];
                tagContext=thisTag.getAttribute("id");
                if(tagContext!=null&&tagContext!="undefined"){
                    this.bindEvent('mousemove',tags[e],function(e){return RightContext.locateMousePos(e);});
                    if(this.menuTriggerEvent=="RIGHT"){
                        tags[e].oncontextmenu=function(){return RightContext.render(this);};
                    } else if(this.menuTriggerEvent=="LEFT"){
                        tags[e].onclick=function(e){
                            RightContext.killBubble(e);
                            return RightContext.render(this)
                        };
                    } else if(this.menuTriggerEvent=="MOVE"){
                        if(!document.all){
                            this.bindEvent('mouseover',tags[e],function(e){RightContext.locateMousePos(e);return RightContext.render(this);});
                            this.bindEvent('mouseout',tags[e],function(e){setTimeout("RightContext.killMenu()",10);});
                        } else{
                            tags[e].onmouseover=function(e){RightContext.locateMousePos(e);return RightContext.render(this);};
                            tags[e].onmouseout=function(e){setTimeout("RightContext.killMenu()",10);};
                        }
                    }
                }
            }
        }
    },
    killBubble:function(e){
    if(!e)var e=window.event;
    e.cancelBubble=true;
    if(e.stopPropagation)e.stopPropagation();
    },
    bindEvent:function(evt,obj,act,bubble){
        if(!bubble)bubble=false;
        if(obj.addEventListener){
            obj.addEventListener(evt,act,bubble);
        }else if(obj.attachEvent){
            obj.attachEvent('on'+evt,act);
        }
    },
    render:function(caller,name){
        var url,title;
        var name=name||caller.getAttribute("id");
        if(name.indexOf('idMenu')>-1){
            var thisMenu=this.getMenu(name);
            var attributes=thisMenu["attributes"].split(',');
            var items=thisMenu.items;
            var objMap=this.buildAttributeMap(attributes,caller);
            this.killMenu();
            this.buildMenu(caller);
            tbl=document.createElement("TABLE");
            tbl.id="rcRightContextTable";
            for(var m=0;m<items.length;m++){

                switch(items[m]["type"]){
                case this.TYPE_MENU:
                    if(this.isDisplayed(items[m],objMap)){
                    this.addMenuItem(items[m],objMap,tbl);
                    }
                    break;
                case this.TYPE_TEXT:
                    text=this.transform(items[m]["text"],objMap);
                    cell=this.addTableCell(tbl,"rcMenuItemText",text);
                    break;
                case this.TYPE_TEXT_EXT:
                    cell=this.addTableCell(tbl,"rcMenuItemTextExt");
                    url=this.transform(items[m]["url"],objMap);
                    // this.request(url,function(){if(RightContext.req.readyState==4&&RightContext.req.status==200){cell.innerHTML=RightContext.req.responseText}});
                    break;
                case this.TYPE_SEPERATOR:
                    cell=this.addTableCell(tbl);
                    cell.appendChild(this.getSeparator());
                    break;
                default:
                break;
                }
            }
            this.contextMenu.appendChild(tbl);
            this.repositionMenu();
            if(this.menuTriggerEvent=="MOVE"){
                this.bindEvent('mouseout',this.contextMenu,function(e){RightContext.abortKill=false;setTimeout("RightContext.killMenu()",10);});
                this.bindEvent('mouseover',this.contextMenu,function(e){RightContext.abortKill=true;});
            }else if(this.menuTriggerEvent=="LEFT"||this.menuTriggerEvent=="RIGHT"){
                this.bindEvent('click',document.body,function(e){setTimeout("RightContext.killMenu();",10);},false);
            }
            this.isShowing=true;
            return false;
        }
    },
    isDisplayed:function(item,objMap){
    var reqVar,reqVal;
    var shown=true;
    if(item["requires"]!=null&&item["requires"]!="undefined"){
        reqVar=item["requires"][0];
        reqVal=item["requires"][1];
        if(objMap[reqVar]!=null&&objMap[reqVar]!="undefined"){
            if(objMap[reqVar]!=reqVal){
            shown=false;
            }
        }else{
            shown=false;
        }
    }
    return shown;
    },
    repositionMenu:function(){
        var mPos=this.findPosition(this.contextMenu);
        var mDim=this.getDimensions(this.contextMenu);
        var winHeight=window.innerHeight||document.body.clientHeight;
        var winWidth=window.innerWidth||document.body.clientWidth;
        if(mPos.y+mDim.height>winHeight-30){
        this.position(this.contextMenu,mPos.x,mPos.y-mDim.height);
            mPos=this.findPosition(this.contextMenu);
        }
        if(mPos.x+mDim.width>winWidth-30){
            this.position(this.contextMenu,mPos.x-mDim.width,mPos.y);
        }
    },
    getSeparator:function(){
        var sep=document.createElement("HR");
        sep.className="rcMenuSeparator";
        return sep;
    },
    addTableCell:function(table,className,content){
        row=table.insertRow(-1);
        cell=row.insertCell(0);
        if(className){
            cell.className=className;
            if(content){
                cell.innerHTML=content;
            }
        }
        return cell;
    },
    addMenuItem:function(item,objMap,tbl){
        var title=this.transform(item["text"],objMap);
        var url,frame,img,imgAlign,itemSrc,tmp,itemAction;
        var cell=this.addTableCell(tbl,"rcMenuItem",title);
        cell.style.cursor=document.all?'hand':'pointer';
        this.bindEvent('mouseover',cell,function(e){this.className="rcMenuItemHover";});
        this.bindEvent('mouseout',cell,function(e){this.className="rcMenuItem";});
        if(item["image"]!=null&&item["image"]!="undefined"){
            imgAlign=(item["align"]!=null&&item["align"]!="undefined")?item["align"]:"absmiddle";
            if(this.images[item["image"]]!=null&&this.images[item["image"]]!="undefined"){
                img=this.images[item["image"]];
            }else{
                img=this.loadImage(item["image"]);
            }
            img.align=imgAlign;
            cell.insertBefore(this.images[item["image"]],cell.childNodes[0]);
        }
        if(item["url"]!=null&&item["url"]!="undefined"){
            url=this.transform(item["url"],objMap);
            frame=false;
            if(item["frame"]!=null&&item["frame"]!="undefined"){
            frame=item["frame"];
            }
            cell.onclick=function(){RightContext.redirect(url,frame);}
        }else{
            itemAction=item["onclick"];
            try{
                itemSrc=item["onclick"].toString();
                if(itemSrc.indexOf('[')>-1){
                    itemSrc=this.transform(itemSrc,objMap);
                    if(document.all){
                        eval('itemAction = '+itemSrc);
                    }else{
                        itemAction=eval(itemSrc);
                    }
                }
            }catch(e){
            }
            cell.onclick=itemAction;
        }
    },
    transform:function(str,map){
        var tStr,tmp;
        tStr=str;
        for(p in map){
            tmp="["+p+"]";
            tStr=tStr.replace(tmp,map[p]);
        }
        return tStr;
    },
    getMenuAttributeArray:function(menu){
        for(var i=0;i<menu.length;i++){
            if(menu[i].type==this.TYPE_ATTRIBUTES){
                return menu[i]["attributes"].split(',');
            }
        }
        return new Array(0);
    },
    buildAttributeMap:function(attribs,obj){
        var thisAttr,thisValue;
        var attrMap=new Object();
        for(var a=0;a<attribs.length;a++){
            thisAttr=attribs[a];
            thisValue=obj.getAttribute(attribs[a]);
            if(typeof thisValue!="undefined"){
                attrMap[thisAttr]=thisValue;
            }
        }
        return attrMap;
    },
    findPosition:function(obj){
        var lft=0;
        var top=0;
        if(obj.offsetParent){
            lft=obj.offsetLeft;
            top=obj.offsetTop;
            while(obj=obj.offsetParent){
                lft+=obj.offsetLeft;
                top+=obj.offsetTop;
            }
        }
        return{x:lft,y:top};
    },
    getDimensions:function(obj){
        var objStyle=obj.style;
        var originalVisibility=objStyle.visibility;
        var originalPosition=objStyle.position;
        var originalDisplay=objStyle.display;
        objStyle.visibility='hidden';
        objStyle.position='absolute';
        objStyle.display='block';
        var originalWidth=obj.clientWidth;
        var originalHeight=obj.clientHeight;
        objStyle.display=originalDisplay;
        objStyle.position=originalPosition;
        objStyle.visibility=originalVisibility;
        return{width:originalWidth,height:originalHeight};
    },
    position:function(obj,x,y){
        obj.style.left=x+'px';
        obj.style.top=y+'px';
    },
    buildMenu:function(parent){
        var pos,dim,tbl;
        this.contextMenu=document.createElement("DIV");
        this.contextMenu.id="rcRightContext";
        this.contextMenu.className='rcMenuContainer';
        pos=this.findPosition(parent);
        dim=this.getDimensions(parent);
        // Position context menu depending on browser
        // All browsers
        this.position(this.contextMenu,this.mousePos.x+this.rightOffset,pos.y+dim.height);
        // Opera
        if( navigator.userAgent.indexOf("opera") ) {
            this.position(this.contextMenu,this.mousePos.x+this.rightOffset,pos.y-dim.height);
        }
        if(this.menuTriggerEvent=="RIGHT"){
            this.contextMenu.oncontextmenu=function(){return false;};
        }
        document.body.appendChild(this.contextMenu);
    },
    killMenu:function(){
        if(!this.abortKill&&this.isShowing){
            try{
                rc=this.contextMenu;
                document.body.removeChild(rc);
            }catch(e){
            }
            this.contextMenu=null;
            this.isShowing=false;
            this.abortKill=false;
        }
    },
    locateMousePos:function(e){
        var posx=0,posy=0;
        if(e==null)e=window.event;
        if(e.pageX||e.pageY){
            posx=e.pageX;posy=e.pageY;
        }else if(e.clientX||e.clientY){
            if(document.documentElement.scrollTop){
                posx=e.clientX+document.documentElement.scrollLeft;
                posy=e.clientY+document.documentElement.scrollTop;
            }else{
                posx=e.clientX+document.body.scrollLeft;
                posy=e.clientY+document.body.scrollTop;
            }
        }
        this.mousePos={x:posx,y:posy};
    },
    redirect:function(u,frame){
        if(!frame){
            document.location=u;
        }else{
            if(frame=="_blank"){
                w=window.open(u,'w');
            }else{
                window.frames[frame].document.location=u;
            }
        }
    },
    request:function(url,callBack){
        if(window.XMLHttpRequest){
            this.req=new XMLHttpRequest();
            this.req.onreadystatechange=callBack;
            this.req.open("GET",url,true);
            this.req.send(null);
        }else if(window.ActiveXObject){
            this.req=new ActiveXObject("Microsoft.XMLHTTP");
            if(this.req){
                this.req.onreadystatechange=callBack;
                this.req.open("GET",url,true);
                this.req.send();
            }
        }
    },
    loadImage:function(url){
        var img=new Image();
        img.src=url;
        img.className="rcImage";
        this.images[url]=img;
        return img;
    }
};