switch...case statement

I was recently looking for the equivalent of the 'SELECT CASE' vb block and stumbled upon javascripts switch,case...
e.g:

switch(document.getElementById("div1").style.color) {
    case "red": color = "255,0,0"; break;
    case "green": color = "0,255,0"; break;
    case "blue": color = "0,0,255"; break;
    default: color = "unknown"; break;
}

Code (markup):

which is the equivalent of:

if(document.getElementById("div1").style.color) color="255,0,0";
else if(document.getElementById("div1").style.color) color="0,255,0";
else if(document.getElementById("div1").style.color) color="0,0,255";
else color="unknown";

Code (markup):

I don't see this used very much, is there any reason behind that? Is it usable in all javascript versions? And how would you use operators such as > or < with it, or 'AND' (&&) and 'OR' (||)?