Permanent character in html form test inout - php

Question

I am making a form that will save to an xml file using php. I have gotten everything to work great, but I want to automatically add a $ to the input field so the user does not have to. How can I start out with a $ as the first character? (Only dealing with whole dollars so I don't need to worry about decimals). This is the simple text input I have made.
<label>Price:</label><br />
<input type="text" name="txtPrice" />

Answer 1

Use ::before in CSS
label::before {
content:"$";
color: blue;
}
<label><input type="text" name="txtPrice" id='input' /></labl>.
Working Demo

Answer 2

Try this:
<label>Price:</label><br />
<input type="text" name="txtPrice" value="$" />
Or this:
<label>Price:</label><br />
$<input type="text" name="txtPrice" value="$" />

Answer 3

I was just having fun with this one, but it puts the $ in the box.
http://jsfiddle.net/NGH7d/3/
Not sure if this will work in IE6-8, also you probably need to adjust the numbers around.
<label class="money">$</label><input type="text" id="txtprice" name="txtPrice" id='input' />
label.money{
color: blue;
float:left;
position:relative;
left:12px;
top:3px;
}
#txtprice {
padding-left:12px;
}