Anchor tag in Drop down

Question

I was researching how to create a drop down menu that once an option is selected, rather than jump to a new page, you scroll down the page via an anchor tag, but I can't quire figure it out.

My logic so far is to set the dropdown to a variable. Take that variable and onchange, compare it to it's current position and as long as the position isn't "0" try to make it follow the anchor link, just as if I was making it load a new page. Can someone help me with what I'm missing?

HTML:

<select name="dropDown" id="dropDown">
<option value="one"><a href="#heading1">one</a></option>
<option value="two"><a href="#heading2">two</option>
<option value="three">three</option>
</select>


<p id="heading1"><a name="heading1">Heading one</a></p>

<br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br    /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br />    <br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br />    <br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /> <br /><br /><br /><br /><br />

<p id="heading2"><a name="heading2">Heading 2</a></p>

JS:

var dropDownValue = document.getElementById("dropDown");

dropDownValue.onchange = function()
{
if(this.selectedIndex !== 0)
{
    window.location.href=this.value;
}
};

Answer 1

Here is a simple example.

P.S: Avoid anchor inside option.

var dropDownValue = document.getElementById("dropDown");

dropDownValue.onchange = function() {
  if (this.selectedIndex !== 0) {
    window.location.href = this.value;
  }
};

p {
  min-height: 500px;
}

<select name="dropDown" id="dropDown">
  <option value="#heading1">one</option>
  <option value="#heading2">two</option>
  <option value="#heading3">three</option>
</select>

<p id="heading1"><a name="heading1">Heading one</a>
</p>
<p id="heading2"><a name="heading2">Heading two</a>
</p>
<p id="heading3"><a name="heading3">Heading three</a>