我无法在 JavaScript 中显示我的数组

Question

I have some simple code in JavaScript. I was going to create code to add first name, last name and age of students from the client by click on "Add Student" button, and show the list of students including the one just added by clicking on the "Show Students" button.

The add action is successful, but when I click on "Show Students" button it just shows me a table without any information(First Name,Last Name,Age) .

 var students = new Array(); var i = 0; function AddStudent() { var patt = /i[az]/; var Fname = prompt("enter first name"); var Lname = prompt("enter last name"); var Age = prompt("enter age"); var std= {fname : Fname,lname : Lname,age : Age } students[i++] =std; } function ShowStudents() { var table = "<table style='background-color:greenyellow; border:solid;'>"; table += "<tr><th>نام</th><th>نام خانوادگی</th><th>سن</th></tr>" for( var j=0;j<students.length;j++) { table += "<tr>" table += "<td>" + students[j].fname +"</td>" table += "<td>" + students[j].lname + "</td>" table += "<td>" + students[j].age + "</td>" table +="</tr>" } table += "</table>"; document.getElementById("ShowStudents").innerHTML = table; }

 <input type="button" value="Add Student" onclick="AddStudent();"/> <input type="button" value="Show Students" onclick="ShowStudents();"/> <div id="ShowStudents"></div>

Answer 1

I think that your browser can not execute instructions without " ; " , so try to add it in this lines :

table += "<tr><th>نام</th><th>نام خانوادگی</th><th>سن</th></tr>"
for( var j=0;j<students.length;j++)
    {                                                      
        table += "<tr>"
        table += "<td>" + students[j].fname +"</td>"
        table += "<td>" + students[j].lname + "</td>"
        table += "<td>" + students[j].age + "</td>"
        table +="</tr>"
    }

because for me it works like a charm.

Answer 2

我在我的 js 页面中有一些评论和无用的功能。最后我清理了评论和无用的功能，它起作用了！