Form validation - UK postcode

[goldy]

Hi i need js validation for my form, iv done everything except validation for a UK postcode, iv had a look on the net, but all the examples seem pretty complicated. Can anyone help?

[RSoftware]

Hi. Here's a little checker using a RegEx which complies with all BS 7666 postcode format rules. I used this a while on a JS validated form. Enjoy!

Code: Select all

function val(){
if((document.getElementById("txtPostCode").value.toUpperCase().match(/GIR 0AA|[A-PR-UWYZ]([0-9]{1,2}|([A-HK-Y][0-9]|[A-HK-Y][0-9]([0-9]|[ABEHMNPRV-Y]))|[0-9][A-HJKS-UW]) [0-9][ABD-HJLNP-UW-Z]{2}/))){return true;}else{return false;}
}

Replace "txtPostCode" with the id of your post code field. (duh!)

Sincerely,
Rob Hardy