//<!--
function GetKeyAscii (event)
    {   
        try
        {
            var keyAscii ;
            
            if(window.event) // IE
              {keyAscii = event.keyCode;}
            else if(event.which) // Netscape/Firefox/Opera
              {keyAscii = event.which;}
            return keyAscii ;
        }
        catch (ex)
            {}
    }
    
function IsCommonAscii (keyAscii)
    {   
        try
        {
            var rv =false ;
        
            switch (keyAscii)
                {
                case 37: case 38: case 39: case 40:
                    //Cursor keys
                    rv=true ;
                break;   
                
                case 9:
                    //backspace keys
                    rv=true ;
                break;
                
                case 8: case 46: 
                    //delete keys
                    rv=true ;
                break;          
            }
            return rv ;
        }
        catch (ex)
            { }
    }
//-->