I have JS code like this to phone num validation... But, it's showing as "valid" msg for the mobile num which i had entered is started with 0,1,2,3,4,5...
But, I want "Valid" msg for mobile num which is starting with 6-9 only.
(Remaing code & functionality are working correctly in/with HTML & CSS code)

Ex : 6012345987 --> valid

JS :
---
function checkPhoneNum()
{
var phone = document.getElementById("pNum").value
var phoneLen = phone.length

var regExp1 = /[0-9]/
var regExp2 = /[^6-9]/
var regExp4 = /[^0-9]/

if (phoneLen == 0)
{
var msg = ""
document.getElementById("phn-err").innerHTML = msg
}

else if (phone.match(regExp1) && phoneLen == 13)
{
var msg = "Valid"
document.getElementById("phn-err").innerHTML = msg
}

else if (phone.match(regExp4) || phone.match(regExp2))
{
var msg = "Invalid"
document.getElementById("phn-err").innerHTML = msg
}
}