js 判断空格

来源：百度知道 编辑：UC知道 时间：2024/06/21 23:42:46
var a1=" "
var a2=" a"
var a3="b "
var a4=" b "
要判断一字符串是否有这样的空格，要怎么写呢
我要JS写的！！！

Private Sub Command1_Click()
Dim s As Integer, f As Integer, r As Integer
r = 0
f = Len(a1) '这里输入的是你要的字符串
For s = 1 To f Step 1
If Asc((Mid(a1, s, 1))) = 32 Then
r = r + 1
Else
r = r
End If
Debug.Print r
Next s

If r = 0 Then
MsgBox "无空格"
Else
MsgBox "有空格"
End If
End Sub