function disableSelection(target) {
        if (typeof target.onselectstart != "undefined")
            target.onselectstart = function() { return false }
        else if (typeof target.style.MozUserSelect != "undefined")
            target.style.MozUserSelect = "none"
        else
            target.onmousedown = function() { return false }
        target.style.cursor = "default"
    }