Horizontal slide toggle

Horizontal slide toggle


I am creating just a fairly simple site which has just one page. What
i want to be able to have is something similar to a draw where to
click on open and then a draw opens from the left hand side to display
some pictures to a user. I have used slideToggle before however that
only seems to do vertical. This is the code I have:
$(document).ready(function(){
    $(".trigger").click(function(){
     $("#toggle_container").animate({
     "width": "toggle", "opacity": 0.8
    }, { duration: "medium" });
    });
});
it closes fine however it doesn't open correctly, it moves a bit but
then jumps open. Is there a different way of doing this?
As a side note I was wondering if instead of clicking on an open
button the object could just be dragged in the direction and continue
in that direction by itself.
hope this makes sense!