I am trying to develop an online form so that my users can enter their mobile phone number correctly on my website.

Basically I want to make it completely fool-proof, where by they would just enter their number (eg. 087 7327273) and the system would cut the first 0 and append their country code ...00353877327273

If anybody has seen this implemented or can give me advice on a different way to do it, i'd be most greatful!

Thanks in advance!

Decbrad