Changing the background to a picture based on an value selection [duplicate]

Answer 1

Try this. NOTE: I deleted your onclick function calling pictype

HTML

    
        pic1
        pic2
        pic3
        pic4
        pic5
        pic6
    

JavaScript

var selectEl = document.getElementById("pictype");

selectEl.onclick = function () {

    if (this.value == "p1") {
        document.body.style.backgroundColor = "Black";
    }
    else {
        document.body.style.backgroundColor = "White";
    }
}