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Assign Javascript Variable To PHP Variable


i have select option on my website.When i choose select option  the value of selecet option which i get in the javascript want to assign to PHP variable .So that i can use that in the query.




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---------------------------------------------------------
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----------------------------------------------------------------------------
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<input type="hidden" name="UserID" value="">
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----------------------------------------------------------------------------

The "UserID" is generated by MySql with auto_increment.[color=blue]
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