I finally got it to work. For anyone in a similar situation here's my final code for the layers. I did change the names of the layers from what they are originally and blacked out the spreadsheet I used, but the changes should be noticeable.
//
//// Set 'Markers'
//
var iconMarker = {externalGraphic: 'http://www.openlayers.org/dev/img/marker.png', graphicHeight: 21, graphicWidth: 16};
var iconGeo = {externalGraphic: './images/fortress.jpg', graphicHeight: 25, graphicWidth: 25};
var iconAero = {externalGraphic: './images/aeropolae.jpg', graphicHeight: 25, graphicWidth: 25}; // Image is the creation of DriveByArtist: http://drivebyartist.deviantart.com/
var vector1 = new OpenLayers.Layer.Vector("1");
var vector2 = new OpenLayers.Layer.Vector("2");
var vector3 = new OpenLayers.Layer.Vector("3");
// Pulls map info from Spreadsheet
//*
Tabletop.init({
key: 'http://xxxxxxxxxx', //Spreadsheet URL goes here
callback: function(data, tabletop) {
var i,
dataLength = data.length;
for (i=0; i<dataLength; i++) { //following are variables from the spreadsheet
locName = data[i].name;
locLon = data[i].long;
locLat = data[i].lat;
locInfo = data[i].info;
locType = data[i].type; // Contains the following string in the cell, which provides a pre-determined output based on provided information in the spreadsheet: =ARRAYFORMULA("<h2>"&B2:B&"</h2><b>"&G2:G&"</b><br /> "&C2:C&", "&D2:D&"<br />"&E2:E&if(ISTEXT(F2:F),"<br /><a target='_blank' href='"&F2:F&"'>Read More...</a>",""))
locLonLat= new OpenLayers.Geometry.Point(locLon, locLat);
switch(locType)
{
case "Geopolae":
feature = new OpenLayers.Feature.Vector(
locLonLat,
{description:locInfo},
iconGeo);
vector1.addFeatures(feature);
break;
case "POI":
feature = new OpenLayers.Feature.Vector(
locLonLat,
{description:locInfo},
iconMarker);
vector2.addFeatures(feature);
break;
case "Aeropolae":
feature = new OpenLayers.Feature.Vector(
locLonLat,
{description:locInfo},
iconAero);
vector3.addFeatures(feature);
break;
}
}
},
simpleSheet: true
});
map.addLayers([vector1, vector2, vector3]);
map.addControl(new OpenLayers.Control.LayerSwitcher());
//Add a selector control to the vectorLayer with popup functions
var controls = {
selector: new OpenLayers.Control.SelectFeature(Array(vector1, vector2, vector3), { onSelect: createPopup, onUnselect: destroyPopup })
};
function createPopup(feature) {
feature.popup = new OpenLayers.Popup.FramedCloud("pop",
feature.geometry.getBounds().getCenterLonLat(),
null,
'<div class="markerContent">'+feature.attributes.description+'</div>',
null,
true,
function() { controls['selector'].unselectAll(); }
);
feature.popup.autoSize = true;
feature.popup.minSize = new OpenLayers.Size(400,100);
feature.popup.maxSize = new OpenLayers.Size(400,800);
feature.popup.fixedRelativePosition = true;
feature.popup.overflow ="auto";
//feature.popup.closeOnMove = true;
map.addPopup(feature.popup);
}
function destroyPopup(feature) {
feature.popup.destroy();
feature.popup = null;
}
map.addControl(controls['selector']);
controls['selector'].activate();
}