I frequently see requests in the various real estate forums for assistance in building an IDX. There main ways that most MLSs provide are:
1. A frame or iframe where you would frame the IDX from the MLS on your web site
2. an idx feed of the raw listing data and convert it so it can be displayed on your web site
The iframe is the quickest and easiest method. Below is an example of iframe syntax for Planetrealtor.com IDX for Florida.
Code:
<div style="background-color:#CED6E0;overflow:hidden;width:100%;">
<iframe style="width:725px; height:800px; border:none;" src="http://fl.living.net/idxfirm/9999999" framespacing="0" frameborder="no" scrolling="no" name="properties"></iframe>
</div>
In future posts I will discuss the concepts for IDX feeds.