Question

//var display = document.getElementById("display"); 
//var question1 = document.quiz.question1.value;                  
//var question2 = document.quiz.question2.value;   
//var question3 = document.quiz.question3.value;   
//var submit = document.getElementById("submit");          
//var correct = 0; 



function check() {   

var display = document.getElementById("display"); 
var question1 = document.quiz.question1.value;                  
var question2 = document.quiz.question2.value;   
var question3 = document.quiz.question3.value;   
var submit = document.getElementById("submit");          
var correct = 0;



if (question1 == "Asmara" || question1 == "asmara") {           
    correct++;     
}  

if(question2 == "Lisbon") {        
    correct++;   
}

if(question3 == "Trump") { 
    correct++;  
}

alert("You got " + correct + "/3 correct!");

}

这是我的代码，每当我在函数内部使用变量运行它时，它就会起作用，但是当我在（全局）外部使用变量运行它时，它似乎不起作用。我是javascript新手，任何建议都值得赞赏！另外请注意，我正在使用事件从html页面调用此函数。

Answer 1

var display = document.getElementById("display"); 
var question1 = document.quiz.question1.value;                  
var question2 = document.quiz.question2.value;   
var question3 = document.quiz.question3.value;   
var submit = document.getElementById("submit");          
var correct = 0; 



function check(display, question1, question2, question3, submit, correct) {   
if (question1 == "Asmara" || question1 == "asmara") {           
    correct++;     
}  

if(question2 == "Lisbon") {        
    correct++;   
}

if(question3 == "Trump") { 
    correct++;  
}

alert("You got " + correct + "/3 correct!");      
}

如果我没记错的话，您需要通过变量作为函数的参数。因此，无论您在何处调用函数，都应将函数调用更改为

check(display, question1, question2, question3, submit, correct)

我需要帮助来了解为什么我的JavaScript代码在一种情况下与另一种情况下不起作用

1 个答案: