var contextMenuObj;
	var MSIE = navigator.userAgent.indexOf('MSIE')?true:false;
	var navigatorVersion = navigator.appVersion.replace(/.*?MSIE (\d\.\d).*/g,'$1')/1;	
	var activeContextMenuItem = false;
	var contextMenuSource = false;	
	
	
	document.documentElement.onclick = autoHideContextMenu;
	function autoHideContextMenu(e)
	{
		if(!contextMenuObj)return;
		if(document.all)e = event;
		if (e.target) source = e.target;
			else if (e.srcElement) source = e.srcElement;
			if (source.nodeType == 3) // Safariでのバグ対策
				source = source.parentNode;

		var tag1 = source;
		var tag2 = source;
		var tag3 = source;
		if(tag1.parentNode)tag2 = tag1.parentNode;
		if(tag1.parentNode.parentNode)tag3 = tag1.parentNode.parentNode;
		
		if(tag1.tagName!='contextMenu' && tag2.tagName!='contextMenu' && tag3.tagName!='contextMenu')contextMenuObj.style.display='none';	
		
	}
	
	function highlightContextMenuItem()
	{
		this.className='contextMenuHighlighted';
	}
	
	function deHighlightContextMenuItem()
	{
		this.className='';
	}
	
	function showContextMenu(e)
	{
		contextMenuSource = this;
		if(activeContextMenuItem)activeContextMenuItem.className='';
		if(document.all)e = event;
		var xPos = e.clientX;
		if(xPos + contextMenuObj.offsetWidth > (document.documentElement.offsetWidth-20)){
			xPos = xPos + (document.documentElement.offsetWidth - (xPos + contextMenuObj.offsetWidth)) - 20;	
		}
		
		var yPos = e.clientY;
		if(yPos + contextMenuObj.offsetHeight > (document.documentElement.offsetHeight-20)){
			yPos = yPos + (document.documentElement.offsetHeight - (yPos + contextMenuObj.offsetHeight)) - 20;	
		}		
		contextMenuObj.style.left = xPos + 'px';
		contextMenuObj.style.top = yPos + 'px';
		contextMenuObj.style.display='block';
		return false;	
	}

	function hideContextMenu(e)
	{
		if(document.all) e = event;
		if(e.button==0 && !MSIE){
			
		}else{
			contextMenuObj.style.display='none';
		}
	}
	
	function initContextMenu()
	{
		contextMenuObj = document.getElementById('contextMenu');
		contextMenuObj.style.display = 'block';
		var menuItems = contextMenuObj.getElementsByTagName('LI');
		for(var no=0;no<menuItems.length;no++){
			menuItems[no].onmouseover = highlightContextMenuItem;
			menuItems[no].onmouseout = deHighlightContextMenuItem;
			
			var aTag = menuItems[no].getElementsByTagName('A')[0];
			
			var img = menuItems[no].getElementsByTagName('IMG')[0];
			if(img){
				var div = document.createElement('DIV');
				div.className = 'imageBox';
				div.appendChild(img);
				
				if(MSIE && navigatorVersion<6){
					aTag.style.paddingLeft = '0px';
				}
				
				var divTxt = document.createElement('DIV');	
				divTxt.className='itemTxt';
				divTxt.innerHTML = aTag.innerHTML;
				
				aTag.innerHTML = '';
				aTag.appendChild(div);
				aTag.appendChild(divTxt);
				if(MSIE && navigatorVersion<6){
					div.style.position = 'absolute';
					div.style.left = '2px';
					divTxt.style.paddingLeft = '15px';
				}
				
				if(!document.all){
					var clearDiv = document.createElement('DIV');
					clearDiv.style.clear = 'both';
					aTag.appendChild(clearDiv);		
				}
			}else{
				if(MSIE && navigatorVersion<6){
					aTag.style.paddingLeft = '15px';
					aTag.style.width = (aTag.offsetWidth - 30) + 'px';
				}else{
					aTag.style.paddingLeft = '30px';
					aTag.style.width = (aTag.offsetWidth - 60) + 'px';
				}
			}
		}
		contextMenuObj.style.display = 'none';		

	}