if ((screen.width >= 2560)) { document.getElementById("html").style.background = "#afb8c3 url(images/wp_2560.jpg) repeat-x" }
else {
    if ((screen.width >= 1920)) { document.getElementById("html").style.background = "#afb8c3 url(images/wp_1920.jpg) repeat-x" }
    else {
        if ((screen.width >= 1600)) { document.getElementById("html").style.background = "#afb8c3 url(images/wp_1680.jpg) repeat-x" }
        else {
            if ((screen.width >= 1440)) { document.getElementById("html").style.background = "#afb8c3 url(images/wp_1440.jpg) repeat-x" }
            else {
                if ((screen.width >= 1152)) { document.getElementById("html").style.background = "#afb8c3 url(images/wp_1152.jpg) repeat-x" }
                else {
                    if ((screen.width >= 1024)) { document.getElementById("html").style.background = "#afb8c3 url(images/wp_1024.jpg) repeat-x" }
                    else { document.getElementById("html").style.background = "#afb8c3 url(images/wp_1280.jpg) repeat-x" } 
                } 
            } 
        } 
    } 
};