comma separated values validation

hi

I have one text box , it can have values like 1 or 1,2 or 1,225,345,21 ie multiple values so ……But now i want textbox should validate
weather values entered by user are proper

toString().match(/^{^(([0-9](,)?)*)+$/)}

This is code i’m using its validating correct only ,but one problem
when user enter values like this
inputval:1,22,34,25,645,

the last comma is not validating
it should through error

can any one help me plz

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