//flaviy 21.09.2007

    function m_popup(){
	window.open("/users/calc/","calc","toolbar=no,menubar=no,scrollbars=yes,width=300,height=250,resizable=no,top=100,left=400");
}
    function ch_image(img_name)
    {
	    if (navigator.userAgent.indexOf("MSIE") != -1) 
		{
			if (current_item !== document.links(img_name).href) {
				document.images[img_name].style.display = 'none';
				document.images[img_name + '_over'].style.display = 'inline';
			}
		}
		else 
		{
			 if (current_item !== document.links[img_name].href) 
			 {
			 	
				document.images[img_name].style.display = 'none';
				document.images[img_name + '_over'].style.display = 'inline';
			 }
		}
			
	   //}
    }
	function ch_image_active(img_name)
	{
      if(img_name.length>0)
      {		
		document.images[img_name].style.display = 'none';
		document.images[img_name + '_over'].style.display = 'inline';
		}
	}
    
    images = new Array();
    
    function ch_image_back(img_name)
    {
    	
            
           
            if (navigator.userAgent.indexOf ("MSIE") != -1)
            {
             	if (current_item!==document.links(img_name).href)
           	 	{
            	
                	  document.images[img_name].style.display='inline';
        			  document.images[img_name+'_over'].style.display='none';
            	}
            }
            else
            
            if (current_item!==document.links[img_name].href)
            {
            	
                 document.images[img_name].style.display='inline';
        		 document.images[img_name+'_over'].style.display='none';
            }
    }