Give me a Code on JS

Give me a Code on JS

I want a java Script Code for this
if
{
the Date is between 01/11/2017 to 30/11/2017 then
Layer1.background image = " images/happydipaboli,jpg"
}
else if
{
the Date is between 01/12/2017 to 31/12/2017 then
Layer1.background image = " images/happynewyear,jpg"
}

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Requirements

Thank You

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Skills Required

Javascript