如果我一次又一次地改变滑块值，Js scipt会崩溃。每次崩溃时我都需要一次又一次地刷新它

Question

基本上我使用html5滑块来更改值。但几次改变价值后，整个网页都崩溃了。在更改滑块的值时，每次调用一个函数。我是新手。请有人帮帮我吗？

滑块代码如下：

<input type="range" id="B1" name="B1" value="0" min="-2" max="2" step="0.1" onchange="JavaScript:main();" oninput="B1val.value = B1.value" />

我使用了许多滑块，如上图所示，并借助此滑块的输入绘制图形。 main（）函数放在标签之间，写在下面以供参考::

function main() {
    // lots more features are available, this is just a "hello world"
    // program.
    var b0 = document.getElementById("B0").value;
    var b1 = document.getElementById("B1").value;
    var b2 = document.getElementById("B2").value;
    var b3 = document.getElementById("B3").value;
    var b4 = document.getElementById("B4").value;
    var b5 = document.getElementById("B5").value;
    var b6 = document.getElementById("B6").value;
    var b7 = document.getElementById("B7").value;
    var b8 = document.getElementById("B8").value;
    var b9 = document.getElementById("B9").value;
    var b10 = document.getElementById("B10").value;
    var b11 = document.getElementById("B11").value;
    var b12 = document.getElementById("B12").value;
    var d = document.getElementById("funct").value;
    var f = document.getElementById("terms").value;
    var fun = document.getElementById("Target").value;;

    var b = 1;
    var e = 0;
    var g = 1;
    var h = 1;
    var j = 0;

    if(d == "sin" && f == "even"){
        document.getElementById("equat").innerHTML = "B2sin(2t)+B4sin(4t)+B6sin(6t)+B8sin(8t)+B10sin(10t)+....";
        document.getElementById("B0").disabled = true;
        document.getElementById("B1").disabled = true;
        document.getElementById("B3").disabled = true;
        document.getElementById("B5").disabled = true;
        document.getElementById("B7").disabled = true;
        document.getElementById("B9").disabled = true;
        document.getElementById("B11").disabled = true;
    }
    if(d == "sin" && f == "odd"){
        document.getElementById("equat").innerHTML = "B1sin(t)+B3sin(3t)+B5sin(5t)+B7sin(7t)+B9sin(9t)+....";
        document.getElementById("B0").disabled = true;
        document.getElementById("B2").disabled = true;
        document.getElementById("B4").disabled = true;
        document.getElementById("B6").disabled = true;
        document.getElementById("B8").disabled = true;
        document.getElementById("B10").disabled = true;
        document.getElementById("B12").disabled = true;
    }
    if(d == "sin" && f == "evenodd"){
        document.getElementById("equat").innerHTML = "B1sin(t)+B2sin(2t))+B3sin(3t)+B4sin(4t)+B5sin(5t)+...";}
    if(d == "cos" && f == "even"){
        document.getElementById("equat").innerHTML = "  (0.5)B0+B2cos(2t)+B4cos(4t)+B6cos(6t)+B8cos(8t)+...";
        document.getElementById("B1").disabled = true;
        document.getElementById("B3").disabled = true;
        document.getElementById("B7").disabled = true;
        document.getElementById("B9").disabled = true;
        document.getElementById("B11").disabled = true;
    }
    if(d == "cos" && f == "odd"){
        document.getElementById("equat").innerHTML = " B1cos(t)+B3cos(3t)+B5cos(5t)+B7cos(7t)+B9cos(9t)+...";
        document.getElementById("B0").disabled = true;
        document.getElementById("B2").disabled = true;
        document.getElementById("B4").disabled = true;
        document.getElementById("B6").disabled = true;
        document.getElementById("B8").disabled = true;
        document.getElementById("B10").disabled = true;
        document.getElementById("B12").disabled = true;
    }
    if(d == "cos" && f == "evenodd"){
        document.getElementById("equat").innerHTML = "   (0.5)B0+B1cos(t)+B2cos(2t)+B3cos(3t)+B4cos(4t)+...";}

    if(d == "cos" && f == "evenodd") {j = 1;}
    else if(d == "cos" && f == "even") {j = 1;}
    else {j = 0;}

    if(d == "sin") {b = "sin"; d = 1;}
    if(d == "cos") {b = "cos"; d = 1;}
    if(d == "sincos") {d = 0; e = 1;}
    if(f == "even") {g = 0; h = 1;}
    if(f == "odd") {g = 1; h = 0;}

    myPlot = new Waveplot(document.getElementById('myPlot'));
    myPlot.addPlot(j+"(0.5)*"+b0+"+"+d+"("+b1+"*"+g+"*"+b+"(0.5*3.14159*x)"+"+"+b2+"*"+h+"*"+b+"(2*3.14159*0.5*x)"+"+"+b3+"*"+g+"*"+b+"(3*3.14159*0.5*x)"+"+"+b4+"*"+h+"*"+b+"(4*3.14159*0.5*x)"+"+"+b5+"*"+g+"*"+b+"(5*3.14159*0.5*x)"+"+"+b6+"*"+h+"*"+b+"(6*3.14159*0.5*x)"+"+"+b7+"*"+g+"*"+b+"(7*3.14159*0.5*x)"+"+"+b8+"*"+h+"*"+b+"(8*3.14159*0.5*x)"+"+"+b9+"*"+g+"*"+b+"(9*3.14159*0.5*x)"+"+"+b10+"*"+h+"*"+b+"(10*3.14159*0.5*x)"+"+"+b11+"*"+g+"*"+b+"(11*3.14159*0.5*x)"+"+"+b12+"*"+h+"*"+b+"(12*3.14159*0.5*x)"+")",WAVEPLOT_TYPE_FUNCTION);
    myPlot.addPlot(fun+"(x)",WAVEPLOT_TYPE_FUNCTION);
    myPlot.reDraw();
}