Calendar function won't trigger

Question

I am trying to trigger a calendar popup on an image with JavaScript, but for some reason, it isn't working correctly. Any advice?

Here is my code:

<input size="12" id="f_date1" class="fields"/>&nbsp;<a href="#" class="f_btn1" title="Select your date and time."><img src="Icons/calendar.png" alt="Calendar" width="16" height="16" border="0" /></a></td>

    <script type="text/javascript">//<![CDATA[
      Calendar.setup({
        inputField : "f_date1",
        trigger    : "f_btn1",
        onSelect   : function() { this.hide() },
        showTime   : 12,
        dateFormat : "%Y-%m-%d %I:%M %p"
      });
    //]]></script>

The CSS and the JS are included in the header.

---

UPDATE

I did that with

<script type="text/javascript">//<![CDATA[
      Calendar.setup({
        inputField : "f_date10",
        trigger    : "f_btn10",
        onSelect   : function() { this.hide() },
        showTime   : 12,
        dateFormat : "%Y-%m-%d %I:%M %p"
      });

      Calendar.setup({
        inputField : "f_date11",
        trigger    : "f_btn11",
        onSelect   : function() { this.hide() },
        showTime   : 12,
        dateFormat : "%Y-%m-%d %I:%M %p"
      });

      Calendar.setup({
        inputField : "f_date12",
        trigger    : "f_btn12",
        onSelect   : function() { this.hide() },
        showTime   : 12,
        dateFormat : "%Y-%m-%d %I:%M %p"
      });

      Calendar.setup({
        inputField : "f_date13",
        trigger    : "f_btn13",
        onSelect   : function() { this.hide() },
        showTime   : 12,
        dateFormat : "%Y-%m-%d %I:%M %p"
      });

      Calendar.setup({
        inputField : "f_date14",
        trigger    : "f_btn14",
        onSelect   : function() { this.hide() },
        showTime   : 12,
        dateFormat : "%Y-%m-%d %I:%M %p"
      });

<script> 

but no dice. It still refuses to fire even with the CSS and JS added...

Answer 1

I guess this is jsCalendar plugin.
Your trigger: "f_btn1" should be an id attribute, not class in the anchor HTML tag.
Like this:

<a href="#" id="f_btn1" title="Select your date and time.">

Instead of this:

<a href="#" class="f_btn1" title="Select your date and time.">

Also, you don't need to wrap img within anchor tag. In the calendar documentation you read about "trigger" parameter:

trigger — an ID of a <button> element (in fact any element type) that should trigger the popup calendar (the calendar hooks on the “onclick” event).