Javacript Validation Problem

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Hello Guys

Can you please help how to make javascript validation?I want to alert a message when a user input both a numeric and a non numeric value in a textfield. e.g. min234.

If the above example was inserted into a textfield a pop up message should be displayed such as "Please enter a non-numeric value only". I've already try that code but it does not work:

C#

function validateFN() 

{ 
var x=document.forms["form1"]["firstname"].value;

if ( isNaN (x) ) 

{ 
alert("Numbers cannot be inserted!"); 

return false; 
} 
}

Thanks guy please help

Posted 22-Nov-13 20:45pm

Nyyir Soobrattee

Updated 22-Nov-13 21:01pm

Thanks7872

v2

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*bjdestiny* · Answer 1 · 2013-11-22T20:51:00

You could add one more else if statement to your code like below:

x=document.myForm.myInput.value;

JavaScript

else if(isNaN(x))

    {
        alert("Number cant be alphabet")
        return false
    }

Below is the Full Script

JavaScript

<script>
            function validate(){
    x=document.myForm.myInput.value;

    if (x >=10)

    {
        alert("Number is bigger than 10")
        return true

    }

    else if(isNaN(x))

    {
        alert("Number cant be alphabet")
        return false
    }
    else

    {
        alert("Number is smaller than 10")
        return false
    }

}
    </script>

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