Question

I was trying to make a javascript function which will check if the user entered value inside a text field cannot be less than 9 digits & it cannot be all 0s.

This is what I made

function CheckField(field)
{
if (field.value.length <9 || field.value=="000000000")
{
alert("fail");
field.focus();
return false;
}
else 
{
return true;
}
}

<input type ="text" id="number1" onBlur='return CheckField(this)'>

But this doesnt check the condition where user enters more than 9 values and all 0’s. It checks only for 1 condition that is with exact 9 zeros 000000000

Answer 1

So, if I understand that right you want the user to be able to enter a number with more than 9 digits, but they cannot be all zeros, right?

This can be done with a regexp:

var value; // Obtain it somehow

if (/^\d{9,}$/.test(value) && !/^0+$/.test(value)) {
    // ok
}

What this checks is whether the value is at lest 9 digits (it does not allow anything but digits) and that they are not all 0s.