Uncheck and Check checkbox in a switch case

When a checkbox will be checked or unchecked, I want the icon to appear or dissappear. Below I am showing how the icon url path looks. Is there any way I can do that? I've been trying myself to add this code to the switch case, but I'm a beginner with js & jquery and I don't know what Im doing wrong.

$('#someId').change(function()  {

        if(this.checked)    {
            $(icon = greenIcon).show(1);
        }
        else    {
            $(icon = greenIcon).hide(1);
        }

    });

    $('#someId2').click(function()  {

        if(this.checked)    {
            $(icon = yellowIcon).show(1);
        }
        else    {
            $(icon = yellowIcon).hide(1);
        }

    });

    $('#someId3').click(function()  {

        if(this.checked)    {
            $(icon = redIcon).show(1);
        }
        else    {
            $(icon = redIcon).hide(1);
        }

    });

    $('#someId4').click(function()  {

        if(this.checked)    {
            $(icon = blueIcon).show(1);
        }
        else    {
            $(icon = blueIcon).hide(1);
        }

    });

into this

switch (feature.properties.status) {
        case 0:   
            icon = greenIcon; break;
        case 1:
        case 11:
        case 12:
            icon = yellowIcon; break;
        case 2: 
        case 21:    
        case 22:    
            icon = redIcon; break;
        case 5: 
        default:
            icon = blueIcon; break;
}

Icons are added to the code like this:

var greenIcon = new LeafIcon({iconUrl: L.Icon.Default.imagePath + 'marker-icon-ok.png'});
var redIcon = new LeafIcon({iconUrl: L.Icon.Default.imagePath + 'marker-icon-err.png'});
var yellowIcon = new LeafIcon({iconUrl: L.Icon.Default.imagePath + 'marker-icon-warn.png'});
var blueIcon = new LeafIcon({iconUrl: L.Icon.Default.imagePath + 'marker-icon-sleep.png'});

So when a checkbox is checked or unchecked, the icon would appear or dissappear. Is it possible?