Question

How can I append an Image using a jquery function with 1 param?

function imageadd(param1){
    $('#random').append(...)
}

with the src being src="gallery/param1.jpg"

Answer 1

Create a new img element and assign the src attribute. Aassuming param1 was the src you could do it like this:

function imageadd(param1){
    $('#random').append($('<img />').attr('src','gallery/' + param1 + '.jpg'));
}

or, if param1 is the full url already:

function imageadd(param1){
    $('#random').append($('<img />').attr('src', param1));
}