Regular Expression - allow emails with period in the name.

I had ran into an issue previously where my regex expression wasn't allowing periods in the name for emails.  for example, my.email@gmail.com wouldn't work.  Thanks to the fine experts at Experts-Exchange, that is working now.

However, email addresses like my.email75@gmail.com or myemail.11@gmail.com don't work.  Here's my expression & the function i'm using:

function regIsEmail(fData){ 
 				
				var reg = new RegExp("^[0-9a-zA-Z\_]+@[0-9a-zA-Z]+[\.]{1}[0-9a-zA-Z]+[\.]?[0-9a-zA-Z]+$");
				return reg.test(fData); 
	}

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To me it looks like it's allowing numbers - so I'm not sure  what needs to be changed.  Any suggestions?
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slightlyoffAsked:
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Lee SavidgeCommented:
I'd go here to find an email validation regex. There are loads:

http://www.regexlib.com/RETester.aspx?regexp_id=26
hieloCommented:
Try:

function regIsEmail(fData){ 
 				
				var reg = new RegExp("^[0-9a-zA-Z\_]+ (?:\.[0-9a-zA-Z\_-]+)*@[0-9a-zA-Z]+[\.]{1}[0-9a-zA-Z]+[\.]?[0-9a-zA-Z]+$");
				return reg.test(fData); 
	}

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slightlyoffAuthor Commented:
Thank you for your help!  that worked great!
slightlyoffAuthor Commented:
Thank you Lee - I did go there, but finding an expression that had all the components was difficult.  now that people can make email addresses like my_name.75@gmail.co.uk it's getting kind of crazy out there...
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Regular Expressions

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