How to auto select current month from dropdown on page load using javascript


I have this drop down and I want to auto select the current month from this drop down when ever the user comes to this page at any time, can any one help me in this regards, I am new to java script and I am learning day by day, your help will be great

<select class="customSelect1 floating" id="month" name="month">
                    <option value="1">Jan</option>
                    <option value="2">Feb</option>
                    <option value="3">Mar</option>
                    <option value="4">Apr</option>
                    <option value="5">May</option>
                    <option value="6">Jun</option>
                    <option value="7">Jul</option>
                    <option value="8">Aug</option>
                    <option value="9">Sep</option>
                    <option value="10">Oct</option>
                    <option value="11">Nov</option>
                    <option value="12">Dec</option>

These links should be helpful: