How do you make sure an entry is a number using JavaScript?

[ConfusedShark]

I need to make sure only a number is entered. I have validation working for when nothing is entered and need to build on that

(inside form)

<td><b>Age:</b></td>
<td><input name="age" size ="4" maxlength="2"></td>

(inside script section of head)

if (myform.age.value=="")
{
alert("No Age Entered");
myform.age.focus();
return false;
}

Thanks

[james_007_400101]

use the method isInteger() to check if the input is integer or not.

Do this:

if (myform.age.value=="")
{
alert("No Age Entered");
myform.age.focus();
return false;
}
else if (isInteger(myform.age.value))
{
alert("value is integer");
}
else
{
alert("value is not integer);
}