我有这个代码，但我不知道为什么它不能工作有人能告诉我吗？

Question

<script>
var a = false;
function toggleBold(){
    a = !a;
    if(a){
        document.getElementById("entertext").style.fontWeight=700;
    }
    else{
        document.getElementById("entertext").style.fontWeight=200;
    }
}

var b = false;
function toggleitalic(){
    b = !b;
    if(b){
        document.getElementById("entertext").style.fontStyle="italic";
    }
    else {
        document.getElementById("entertext").style.fontStyle="normal";
    }
}

var c = false;
function toggleline() {
    c =!c;
    if(c){             
       document.getElementById("entertext").style.textDecoration="underline";
    }
    else {
        document.getElementById("entertext").style.textDecoration="none";
    }
}


var r = false;
function togglered() {
    console.log("clicked");
    r=!r;
    if(r){
        document.getElementById("entertext").style.color="red";
    }
    else{
        document.getElementById("entertext").style.color="black";
    }
}

var b = false;
function toggleblue() {
    console.log("clicked");

    b=!b;
    if(b){
        document.getElementById("entertext").style.color="blue";
    }
    else{
        document.getElementById("entertext").style.color="black";
    }
}

var g = false;
function togglegreen() {
    g=!g;
    if(g){
        document.getElementById("entertext").style.color="green";
    }
    else{
        document.getElementById("entertext").style.color="black";
    }
}

var imp = false;
function togglefontA(){
    imp = !imp;
    if(imp){
        document.getElementById("entertext").style.fontFamily= "Impact,Charcoal,sans-serif";
    }
}


var tim = false;
function togglebfontB(){
    tim=!tim;
    if(tim){
        document.getElementById("entertext").style.fontFamily = "Times New Roman, Times, serif";
    }
}

var age = false;
function togglefontC(){
    age=!age;
    if(age){
        document.getElementById("entertext").style.fontFamily = "Agency FB, verdana, helvetica, sans-serif";
    }
}

var nor = false;
function togglefontD(){
    nor=!nor;
    if(nor){
        document.getElementById("entertext").style.fontFamily = "Arial, Helvetica, sans-serif";
    }
}


function rgb(){
    if(check()){
        document.getElementById("entertext").style.backgroundColor =
            "rgb("+document.getElementById("red").value+","
            + document.getElementById("green").value+","
            + document.getElementById("blue").value+")";
    }
    else{
        document.getElementById("entertext").style.backgroundColor = "white";
    }
}

function check(){
    var red= document.getElementById("red").value;
    var green= document.getElementById("green").value;
    var blue= document.getElementById("blue").value;
    return red <= 255 && red >= 0 && green <= 255 && green >= 0 && blue <=    255 && blue >= 0; 
}

   </script>

所以我遇到的问题是这段代码可以在我个人笔记本电脑上的 Internet Explorer 上运行，但不能在 chrome 上运行。在我的 uni 计算机上，该代码在 chrome 或 Internet Explorer 上根本不起作用。我试图通过代码寻找放错位置的括号，但未能找到问题所在。这种情况以前发生过，问题是支架放错了或丢失了。如果有人可以通过这段代码告诉我有什么问题或遗漏？

Answer 1

这本身并不完全是一个答案，但这里有一些建议的改进，它们限制了重复代码的位数，并且没有任何全局变量。

/* This only operates on the element with id="entertext". 
 * You could easily rewrite the function to pass in an element to 
 * operate on.  If no 3rd parameter is passed, it won't do anything if the
 * style is not equal to the first.
 */
function toggleStyle(property,ifTrueValue,ifFalseValue){
    var el = document.getElementById('entertext');
    if( el.style[property] !== ifTrueValue )
        el.style[property] = ifTrueValue;
    else if (typeof ifFalseValue !== 'undefined')
        el.style[property] = ifFalseValue;
    }
}

function toggleBold(){
    toggleStyle('fontWeight',700,200);
}

function toggleitalic(){
    toggleStyle('fontStyle','italic','normal');
}

function toggleline() {
    toggleStyle('textDecoration','underline','none');
}

function togglered() {
    toggleStyle('color','red','black');
}

function toggleblue() {
    toggleStyle('color','blue','black');
}

function togglegreen() {
    toggleStyle('color','green','black');
}

function togglefontA(){
    toggleStyle('fontFamily',"Impact,Charcoal,sans-serif")
}


function togglebfontB(){
    toggleStyle('fontFamily',"Times New Roman, Times, serif");
}

function togglefontC(){
    toggleStyle('fontFamily',"Agency FB, verdana, helvetica, sans-serif";
}

function togglefontD(){
    toggleStyle('fontFamily',"Arial, Helvetica, sans-serif");
}


function rgb(){
    var rgb = getRGB()
        color;

    if( rgb == false)
        color = 'white';
    else
        color = "rgb("+rgb.red+","+rgb.green+","+rgb.blue+")";
    toggleStyle('backgroundColor', color );
}


function getRGB(){
    var red= document.getElementById("red").value;
    var green= document.getElementById("green").value;
    var blue= document.getElementById("blue").value;
    if( red <= 255 && red >= 0 && green <= 255 && green >= 0 && blue <= 255 && blue >= 0 ) {
        return {
            'red': red,
            'green': green,
            'blue': blue
        }
    } else 
        return false;
}