How about -

    detectAJAX = function() {
        try { xmlhttpcheck = new ActiveXObject("Msxml2.XMLHTTP"); }
        catch (e) { try { xmlhttpcheck = new 
ActiveXObject("Microsoft.XMLHTTP"); }
        catch (e) { try { xmlhttpcheck = new XMLHttpRequest(); }
        catch (e) { xmlhttpcheck = false; }}}
        if (!xmlhttpcheck) {
            return false;
        }
        else {
            return true;
        }
    };


Thanks,
Mandy.

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