function fn_get_object(idName)
{
    if(document.getElementById){
        return document.getElementById(idName);
    }
    
    else if(document.all){
      return document.all(idName);
    }
    
    else if(document.layers){
        return document.layers[idName];
    }

}


function fn_set_visible(idName,bVisible)
{

	if(document.getElementById || document.all ){
		var obj = fn_get_object(idName);
		
		if( !obj ){
			return;
		}
				
		if( bVisible ){
			obj.style.visibility = 'visible';
		}
		else{		
			obj.style.visibility = 'hidden';
		}		
    }
    else{
		if( bVisible ){
			document.layers[idName].visibility = 'show';
		}
		else{
		 	document.layers[idName].visibility = 'hidden';			
		}
    }
    
}