[SalesForce] Submit button on Visualforce action page

Working on Salesforce1 too, and I found that for you. I hope it's what you are looking for. Works perfectly for me. Here is the source doc

<script type='text/javascript' src='/canvas/sdk/js/publisher.js'></script>
<script> 
    Sfdc.canvas.publisher.subscribe({name: "publisher.showPanel",
        onData:function(e) {
            Sfdc.canvas.publisher.publish({name:"publisher.setValidForSubmit", payload:"true"});
    }});
    Sfdc.canvas.publisher.subscribe({ name: "publisher.post",
        onData: function(e) {
            alert("call some remote action here");
            Sfdc.canvas.publisher.publish({ name: "publisher.close",
                payload:{ refresh:"true" }});
    }}); 
</script>

The code turns off the Publisher for VF pages.

You can't do it in a supported way. I've filed a feature request to allow this. In the mean time, I wrote you a function to try.

var unsupportedShowMdp=function(a){
    SfdcApp.projectOneNavigator.fireContainerEvent(
        "one:updateMDPVisibility",{show:a}
    )
};

// Use it like this

unsupportedShowMdp(true);

Unsupported. I give it a 80% chance it stops working next release, but by then we might have a supported way of doing this.