[DMetalKong]

First of all, let me point you to the w3schools website. They have a lot of useful tutorials on web-related topics - for your case they have a good date object reference.

Second, you can use the getDay() method along with a switch statement to do what you want. See below

var d = new Date();
switch(d.getDay()) {
    case 0:
        //do Sunday stuff here
        break;
    case 1:
        //do Monday stuff here
        break;
    //...
    //...
    case 6:
        //do Saturday stuff here
        break;
}

Hope that helps.