JavaScript中的AppleScript字符串连接

Question

我试图自动化Google Docs登录过程，但我认为这样做的方法不会产生任何结果。代码如下。

display dialog "Username" default answer "" 
set Username to the result 
display dialog "Password" default answer "" with hidden answer 
set myPassword to the result 
tell application "Google Chrome" 
    tell window 1 
     set newTab to make new tab with properties {URL:"https://accounts.google.com/ServiceLogin?service=writely&passive=1209600&continue=https://docs.google.com/?tab%3Dwo%23&followup=https://docs.google.com/?tab%3Dwo&ltmpl=homepage"} 
     repeat 50 times --wait until the page loads... 
      delay 0.1 
     end repeat 
     tell active tab 
      execute javascript "document.getElementById('Email').value = '" & Username & "'" 
     end tell 
    end tell 
end tell 

有问题的代码是execute javascript "document.getElementById('Email').value = '" & Username & "'"。每当我尝试使用字符串连接执行JavaScript时，出现以下错误：“无法将{text returned：”hello“，button returned：”OK“}转换为Unicode类型文本。”

我也尝试使用下面的，而不是用keystroke命令一起改变字段的值
execute javascript "document.getElementById('Email').click()"。但是，这也没有用。我做错了什么，还是仅仅是AppleScript？

值得注意的是，下面的代码工作
execute javascript "document.getElementById('Email').value = '" & "Hello" & "'"。

Answer 1

因为display dialog命令的结果是记录。

得到一个字符串，使用：

display dialog "Username" default answer "" 
set Username to text returned of the result 
display dialog "Password" default answer "" with hidden answer 
set myPassword to text returned of the result