on backspace key usage fire ssjs

Question

On an xpage in an edit box I would like to fire some ssjs (set scopevariable, call a function in a managed bean, perform a partial refresh) when the backspace key is used.

in csjs I could detect it:

 $('html').keyup(function(e){if(e.keyCode == 8)alert('backspace trapped')}) 

How do I do this is SSJS?

Answer 1

it became something like this:

<xp:button value="Queue" id="btnQueue" styleClass="btn-primary">

    <xp:eventHandler event="onclick" submit="true" refreshMode="complete">
        <xp:this.action>

            <xp:actionGroup>
                <xp:executeScript>
                    <xp:this.script>
                        <![CDATA[#{javascript://my action(s) here}]]>
                    </xp:this.script>
                </xp:executeScript>

            </xp:actionGroup>
        </xp:this.action>

        <xp:this.script>
            <![CDATA[confirm("Are you sure you want to change from " + XSP.getElementById("#{id:inputFrom}").value +" to " + XSP.getElementById("#{id:inputTo}").value + "?")]]>
        </xp:this.script>
    </xp:eventHandler>
</xp:button>