calc.js

function fun(){

    console.log(3);
    var lfixed = document.getElementById('lfixed').checked;
    var rfixed =  document.getElementById('rfixed').checked;
    var lpinned =  document.getElementById('lpinned').checked;
    var rpinned =  document.getElementById('rpinned').checked;
    var pointed =  document.getElementById('pointed').checked;
    var uniform =  document.getElementById('uniform').checked;

    console.log(3);

    var l =  parseFloat(document.getElementById('length').value);
    var E =  parseFloat(document.getElementById('elasticity').value);
    var I =  parseFloat(document.getElementById('inertia').value);
    var a =  parseFloat(document.getElementById('pos_a').value);
    var W =  parseFloat(document.getElementById('weight').value);
    var x =  parseFloat(document.getElementById('pos_x').value);

    var b = parseFloat(l-a);
    var d, V, M;

    console.log(3);


    if(lfixed && rfixed && pointed) {

        // V = Pb/L – P (x-a)0
        // M = Pbx/L – P (x-a)1
        // δ = P/6EI [bx3/L – abx/L (2L – a) – (x – a)3]
        // DONE

        V = W*b/l - W;
        M = W*b*x/l - W*(x-a);
        d = (W*(b*Math.pow(x,3)/l - a*b*x*(2*l-a)/l - Math.pow((x-a), 3)))/6*E*I;

        // alert(V);
        // alert(M);
        // alert(d);

        document.getElementById("d").innerText = d;
        document.getElementById("V").value = V;
        document.getElementById("M").value = M;

        // document.getElementById("answer").innerHTML= V;
        // parseFloat(document.getElementById("answer").value) = V;

        // window.open('/beam1.html');
    }

    else if(lfixed && rfixed && uniform) {
        // V = W (L/2 – x)
        // M = W/12 (6Lx – L2 – 6x2)
        // δ = wx2/24EI (L – x)2
        // DONE

        V = W*(l/2 - x);
        M = W*(6*l*x - l*l - 6*x*x);
        d = W*x*x*(l-x)*(l-x)/(24*E*I);

        alert(V);
        alert(M);
        alert(d);

        // document.getElementById("answer").value = string(V);
        // document.getElementById("answer").innerHTML= V;
        // parseFloat(document.getElementById("answer").value) = V;

        // window.open('/beam2.html');
    }

    else if(lpinned && rpinned && pointed) {
        // V = Pb/L – P (x-a)0
        // M = Pbx/L – P (x-a)1
        // δ = P/6EI [bx3/L – abx/L (2L – a) – (x – a)3]
        // done

        V = W*(b/l - 1);
        M = W*(b*x/l - (x-a));
        d = W*(b*Math.pow(x,3)/l - a*b*x*(2*l - a)/l - Math.pow((x-a), 3))/(6*E*I);

        alert(V);
        alert(M);
        alert(d);

        // document.getElementById("answer").value = string(V);
        // document.getElementById("answer").innerHTML= V;
        // parseFloat(document.getElementById("answer").value) = V;

        window.open('/beam3.html');
    }

    else if(lpinned && rpinned && uniform) {
        // V = w (L/2 – x)
        // M = wx/2 (L – x)
        // δ = wx/24EI (L3 – 2 Lx2 + x3)
        // done

        V = W*(l/2 - x);
        M = W*(l/2 - x)*x/2;
        d = W*x*(l*l*l - 2*l*x*x + x*x*x)/(24*E*I);

        alert(V);
        alert(M);
        alert(d);

        // document.getElementById("answer").value = string(V);
        // document.getElementById("answer").innerHTML= V;
        // parseFloat(document.getElementById("answer").value) = V;

        window.open('/beam4.html');
    }

    else if(lpinned && rfixed && pointed) {
        // V = Pb2/2L3 (2L + a) – P(x – a)0
        // M = Pb2x/2L3(2L + a) – P (x – a)1
        // δ = P/6EI[b2x3/2L3 (2L + a) – 3ab2x/2L – (x – a)3]
        // done

        V = W*b*b*(2*l + a)/(2*l*l*l) - W;
        M = W*b*b*x*(2*l + a)/(2*l*l*l) - W*(x-a);
        d = W*((b*b*x*x*x*(2*l + a))/(2*l*l*l) - 3*a*b*b*x/(2*l) - Math.pow((x-a), 3))/(6*E*I);

        alert(V);
        alert(M);
        alert(d);

        // document.getElementById("answer").value = string(V);
        // document.getElementById("answer").innerHTML= V;
        // parseFloat(document.getElementById("answer").value) = V;

        window.open('/beam5.html');
    }

    else {
    document.write("Condotion not matched");
}

}