function function1() {
        document.form11.r1[0].checked = true;
    }
function function2() {
        document.form11.r1[1].checked = true;
    }
function function3() {
        document.form11.r1[2].checked = true;
    }
function function4() {
        document.form11.r1[3].checked = true;
    }