Cross-Domain and ExtJS

Currently I'm 开发者_开发问答stuck with a problem with the OPTIONS method type which I cannot change and ScriptTagProxy isn't working that well for me is there any way to set ExtJs.data.JsonStore to open a proxy with POST method type?

ScriptTagProxy is probably the only ExtJS provided solution you have to go cross domain.
You can configure your JsonStore with a ScriptTagProxy (via JsonStore's proxy config attribute)

The best way forward would be to see why ScriptTagProxy isn't working and fix it.