Question

I want to check the gap between two or more words, i have given as an input, in a text box. If there had any space, then i want to alert user that no space is allowing. I can check the existence of text simply using “if else” statement. But can’t do the desired stuff in this way. My code is given below :

<script type="text/javascript">

function checkForm()

    {

        var cName=document.getElementById("cName").value;
        var cEmail=document.getElementById("cEmail").value;

        if(cName.length<1)

        {
            alert("Please enter both informations");
            return false;
        }

        if(cEmail.length<1)
        {
            alert("Please enter your email");
            return false;
        }

        else
        {
            return true;
        }

    }

        Name : <input type="text" id="cName" name="cName"/>
        <br/>
        <br/>
        Email : <input type="text" id="cEmail" name="cEmail"/>
        <br/>
        <br/>
        <input type="submit" value="Go!"/>

        </form>

• Thankyou

Answer 1

Just use the match() method of strings. For example:

'Spaces here'.match(' ');

That returns true.

'Nospace'.match(' ');

That returns false.

So for what you want, just use something like this:

if(cName.match(' ')){
   alert('Spaces found!');
   return false;
}

Demo