Use Javascript to click through months

Hi guys,

I have got a calendar together which displays the days of the month but I'd like to use a couple of javascript buttons on the page to increase and decrease the "$newdate = strtotime('+0 month', $current_month);" to allow the users to click through the different months. Well, this is how I'd do it but I'm open to suggestions on how to click through the months.

Any help would be amazing. Thank you for reading this.

<?php

date_default_timezone_set('Europe/London');

$current_month = time();

$newdate = strtotime('+0 month', $current_month);


$day = date('d', $newdate) ;
$month = date('m', $newdate) ;
$year = date('Y', $newdate) ;

$first_day = mktime(0,0,0,$month, 1, $year) ;

$title = date('F', $first_day) ;


 $day_of_week = date('D', $first_day) ;


 switch($day_of_week){

 case "Mon": $blank = 0; break;

 case "Tue": $blank = 1; break;

 case "Wed": $blank = 2; break;

 case "Thu": $blank = 3; break;

 case "Fri": $blank = 4; break;

 case "Sat": $blank = 5; break;

 case "Sun": $blank = 6; break;

 }


 $days_in_month = cal_days_in_month(0, $month, $year) ;


 $day_count = 1;


 while ( $blank > 0 )

 {

 echo "<div class=\"spacer\">
  <a href=\"#\"></a>
  </div>";

 $blank = $blank-1;

 $day_count++;

 }


 $day_num = 1;


 while ( $day_num <= $days_in_month )

 {

 echo "<div class=\"number_block\">
  <a href=\"#\">$day_num</a>
  </div>";

 $day_num++;

 $day_count++;

 }

?>

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