How do I combine 2 RegEx statements together, using JavaScript/RegEx?

I've been looking at RegEX's and don't know how to combine 2 regex statements together, for example

I have this JQuery code:

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$('.numeric').keyup(function () { 
    $(this).toggleClass('field-error', /\D/.test(this.value));
}); 

How do I combine this with the regex ^0 ...means any number begining with zero

Any help would be greatly appreciated, Thanks

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You could use:

/^0|\D/

Which simply matches ^0 or \D.

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/^0|\D/

Use the pipe (|) character to symbolize you want either the left or the right side.

e.g. to match apple, orange or banana you can use:

/apple|orange|banana/