RegEx Issue

[adityagundecha]

Using the following in data.json
{
"key":"contact",
"type":"edit_text",
"hint":"Contact",
"v_reg" : {
"value" : "^[789]\d{9}$",
"err" : "Enter a valid contact number."
}
},
{
"key":"postal_code",
"type":"edit_text",
"hint":"Postal Code",
"v_email":{"value":"^\d{3}\s?\d{3}$",
"err":"Invalid Zip Code"
}
},
{
"key":"employee_id",
"type":"edit_text",
"hint":"Employee Number",
"v_email":{"value":"^[0-9]{4}$",
"err":"Enter a 4 digit Employee ID"
}
}

But the reg exp is not getting validated.
Can someone please help?