腳本產生錯誤我找不到

Question

的最終目的是要返回仙界顯示下面的句子

從前，有一個名爲NAME
性別誰了一個名爲寵物的名字PET的頁面。

<SCRIPT language="JavaScript"> 

var heroGender, heroName, petType, petName; 

heroGender = window.prompt('Is the hero female or male? Enter F or M', 'F'); 

heroName = window.prompt('What is the hero\'s name?',''); 

petType = window.prompt('What type of pet does the hero have?',''); 

petName = window.prompt('What is name of the pet?',''); 

    document.write('Once upon a time there was a '); 

if (heroGender == ('F')) 
{ 
    document.write('girl'); 
} 
else 
{ 
    document.write('boy'); 
} 

document.write('Once upon a time there was a ' + heroGender + ' named ' + heroName '.''<BR>' + 
            heroName + ' had a ' + petType + ' called ' + petName + '.'); 

</SCRIPT> 

Answer 1

我覺得你在最後document.write.You're有一些錯別字heroName後缺少一個「+」 ...和你有一些重複document.writes。

這就是我認爲應該是你的最終代碼：

var heroGender, heroName, petType, petName; 
heroGender = window.prompt('Is the hero female or male? Enter F or M', 'F'); 
heroName = window.prompt('What is the hero\'s name?',''); 
petType = window.prompt('What type of pet does the hero have?',''); 
petName = window.prompt('What is name of the pet?',''); 

if (heroGender == ('F')) { heroGender ='girl'; } else { heroGender = 'boy'; } 
document.write('Once upon a time there was a ' + heroGender + ' named ' + heroName + '. ' + heroName + ' had a ' + petType + ' called ' + petName + '.'); 

Answer 2

當你等待的書！

從Mozilla Developer Centre學習！

一個例子：

Example

修正版本

document.write(
    'Once upon a time there was a ' + heroGender + 
    ' named ' + heroName + '.' + '<BR>' + heroName + 
    ' had a ' + petType + ' called ' + petName + '.'); 

破碎版本

你失蹤到+符號。

document.write(
    'Once upon a time there was a ' + heroGender + 
    ' named ' + heroName /* + */ '.' /* + */ '<BR>' + heroName + 
    ' had a ' + petType + ' called ' + petName + '.'); 

嘗試使用

• Firefox和Firebug和其控制檯選項卡（命中F12）
• IE9和控制檯版本（點擊F12。確保控制檯打開再刷新）。
• Chrome並在控制檯構建（按Ctrl + Shift鍵+ J）

要觀看任何錯誤消息。

如果這是太多的精力，然後嘗試

window.onerror = function(e) { 
    alert(e.message); 
} 

下面是一個「改良」更符合標準的版本。 Example Link!

HTML：

<label> Your Hero's gender </label><input id="heroGender"/><br/> 
<label> Your Hero's name </label><input id="heroName"/><br/> 
<label> Your Hero's pet type </label><input id="petType"/><br/> 
<label> Your Hero's pet name </label><input id="petName"/><br/> 
<button> Make me a hero! </button> 
<div id="output"></div> 

的JavaScript：

// make your hero when you press the button 
document.getElementsByTagName("button")[0].addEventListener("click", function() { 
    // get all the values from the text boxes 
    var gender = document.getElementById("heroGender").value, 
     name = document.getElementById("heroName").value, 
     petType = document.getElementById("petType").value, 
     petName = document.getElementById("petName").value; 

    // set the text on your output. 
    document.getElementById("output").textContent = 
     "Once upon a time there was a " + gender + 
     " named " + name + ". " + name + " had a pet " + 
     petType + " called " + petName; 


}, false); 

上面的代碼將打破IE8或更低:(使JavaScript的工作跨瀏覽器是一個正確的疼痛。

所以我，你可以在

• Firefox's MDN
• 微軟JavaScript docs和HTML docs

閱讀瀏覽器的文檔，但這些都不是容易閱讀和瀏覽。跨瀏覽器腳本的一個很好的視覺指南是visibone BrowserBook。

它會顯示跨瀏覽器支持（紅色火狐，藍色是IE）：

給它幾個月，你就會知道如何使用所有的舒適。

Answer 3

太多的報價，而遺漏加

Error: missing) after argument list 
Source File: http://fiddle.jshell.net/_display/ 
Line: 41, Column: 83 
Source Code: 
document.write('Once upon a time there was a ' + heroGender + ' named ' + heroName '.''<BR>' + 

應該

document.write(' named ' + heroName + '.<BR>' + 
heroName + ' had a ' + petType + ' called ' + petName + '.'); 

http://jsfiddle.net/mplungjan/zHGsD/

Answer 4

有在這一行中有語法錯誤：

document.write('Once upon a time there was a ' + heroGender + ' named ' + heroName '.''<BR>' + heroName + ' had a ' + petType + ' called ' + petName + '.'); 

特異性ically，在這裏：

heroName '.''<BR>' + heroName 

如果改成這樣，你應該按預期工作：

document.write(' named ' + heroName + ' who had a ' + petType + ' called ' + petName + '.'); 

請注意，我還移除了這句話的第一部分冗餘，因爲你已經列入它在你之前「如果'F'，然後'女孩'」聲明。

Answer 5

問題出在您的最後一行上。更正如下

document.write('Once upon a time there was a ' + heroGender + ' named ' + heroName + '.' + '<BR>' + heroName + ' had a ' + petType + ' called ' + petName + '.'); 

Answer 6

document.write('Once upon a time there was a ' + heroGender + ' named ' + heroName **+** '.' **+** '<BR>' + 
            heroName + ' had a ' + petType + ' called ' + petName + '.'); 

我把它加入兩個+，我已經包裹在**