使用Javascript正则表达式验证HTML表单

Question

I am having a script which validates a user's name. When the user enters name without spaces then it works fine. If user enters name with spaces (name, surname, lastname etc) then it is not working. I am trying to capture 'space' character using \\s but it is not working.

My script is:

var name=document.forms["newform"]["fullname"].value; //get the name from HTML form
var charpos = name.search("[^A-Za-z\s]");
if (name.length <= 0 || name.length>=50 || charpos >= 0)
{
    alert('wrong.');
}
else
{
     alert('correct');
}

Input1: AFGH

Output1: correct

Input2: ABCD EFGH

Output2: wrong

When Input2 is given, charpos gets the value '5'.

Answer 1

The string literal is swallowing the \\ .

You should use a regex literal:

name.search(/[^A-Za-z\s]/);