Question

Quick question: is this kind of nesting possible?
An if statement first passing a switch and then another if statement so it won’t affect other values that were not caught on switch?

var cookie = ""; //some value previously setted by filtering a cookie, like a product id
var prod = "";
var img = "";
if ((cookie != null) && (prod != '')) {
    switch (cookie) {
    case '001': case '002': case '003':
        prod = "Product01";
        img = "product01.jpg"
        break;
    case '004': case '005': case '006':
        prod = "Product02";
        img = "product02.jpg"
        break;
    case '007': case '008':
        prod = "Product03";
        img = "product03.jpg"
        break;
    case 'null':
        break;
    }
    if (window.location.pathname == 'somepage') {
        //jQuery code
    } else if (window.location.pathname == 'anotherpage') {
        //jQuery code
    } else {
        //jQuery code
    }
}

Answer 1

Yes it is.
You can write something like

if (condition){
    switch(n)
    {
    case 1:
      execute code block 1
      break;
    case 2:
      execute code block 2
      break;
    default:
      code to be executed if n is different from case 1 and 2
    }
}

and also

    switch(n)
    {
    case 1:
      if (condition)
        {
        code to be executed if condition is true
        }
      break;
    case 2:
      execute code block 2
      break;
    default:
      code to be executed if n is different from case 1 and 2
    }

..well I’m not going to show all the cases…

Just have a look here http://www.w3schools.com/js/js_switch.asp and here http://www.w3schools.com/js/js_if_else.asp you’ll find more details also about the else statement. And as somebody sad in the comments: try it!
Often it’s the best way to understand.