Two state button and context menu

We defined a two-state-button that has a context menu. We would like not to change the status of the two-state-button to right-click, just at click.
How to achieve this?

Thanks in advance

Not nice but fixed … if u have a better id pls post it

this.obj[b._isIPad ? "ontouchstart" : "onmousedown"] = function (type) { if (type.button!=0) return false; if ((!b.checkEvent("onBeforeStateChange") || b.callEvent("onBeforeStateChange", [this.idd.replace(b.idPrefix, ""), this.pressed])) && c.state != !1 && b.anyUsed == "none") { this.className = (this.pressed = !this.pressed) ? "dhx_toolbar_btn pres" : this.renderAs; var a = this.idd.replace(b.idPrefix, ""); if (this.extAction)try { window[this.extAction](a, this.pressed) } catch (d) { } b.callEvent("onStateChange", [a, this.pressed]); return!1 } };