Problem creating Popup content for Openlayers

I have a map created using OpenLayers and now i am working to get a popup configured correctly.  I have a feature attribute which contains a file name for a PDF.  When the feature is clicked I would like to be able to create a link to the filename but I am having problem getting the link to work.  Below is the content for the popup but it does not create the link:

"Owner: " + feature.attributes.OWNER + " <br> " + "<a href=" + feature.attributes.AB_PDF + ">"
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What errors are you getting in the console?  You will need to post a link so we can see what you are doing in context.

GreyHippoAuthor Commented:
I am reading all my layers into the map via a remote JSON file and within the JSON file there are information for each layer such name, geojson url, stylemap, and information for a popup.

JSON file:

"layers": [
{ "title":"FTMA San Pipe" , "url":"./ftma_sanpipe_3857.geojson" , "style": "layer.styleMap = sanpipe_stylemap;", "info" : "\"Owner: \" + feature.attributes.OWNER + \" <br> \" + \"<a href=\" + feature.attributes.AB_PDF + \">\""},
{ "title":"FTMA San MH" , "url":"./ftma_sanmh_3857.geojson" , "style" : "layer.styleMap = manhole_stylemap;", "info" : "\"Mh ID: \" + feature.attributes.STRUCT_ID"}

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Below is the code for the popup:
function onFeatureSelect(evt) {
                feature = evt.feature;
                popup = new OpenLayers.Popup.FramedCloud("featurePopup",
                                         new OpenLayers.Size(200,200),
                                         eval (feature.layer.popup_info),
                                         null, true, onPopupClose);
                feature.popup = popup;
                popup.feature = feature;
                map.addPopup(popup, true);
				//alert ("select");

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I do not get any errors in the console.  It just doesn't display the link.
Robert SchuttSoftware EngineerCommented:
The <a href> in the info field needs to be followed by the link text and a closing tag for the link to display, so the JSON file could look something like this:
"layers": [
{ "title":"FTMA San Pipe" , "url":"./ftma_sanpipe_3857.geojson" , "style": "layer.styleMap = sanpipe_stylemap;", "info" : "\"Owner: \" + feature.attributes.OWNER + \" <br> \" + \"<a href=\" + feature.attributes.AB_PDF + \">read pdf file</a>\""},
{ "title":"FTMA San MH" , "url":"./ftma_sanmh_3857.geojson" , "style" : "layer.styleMap = manhole_stylemap;", "info" : "\"Mh ID: \" + feature.attributes.STRUCT_ID"}

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