In HTML, we can make references to an element by the "id" attribute.
Example: input type="text" name="carrier" id="carrierId"
We can reference this element in javascript as document.getElementById("carrierId")
In Struts, 1.1 we do not have this attribute "id". To make a reference we can instead use the styleId attribute
Example: <html:text property="carrier" styleId="carrierId" />