Spotfire Redirecting to home after link click - redirect

Question

Ask: Have a button that when clicked downloads a file from a folder on the server and remains on the current page.
Current state and problem: I have a CustomWizardPromptControlPage that writes a simple button to the HTMLTextWriter. The onclick event for the button fires off a window.open(urlToDocument, '_blank'). By doing the button with the onclick it does actually allow me to download the file, however the parent page redirects to the home page.
Already tried: href - didn't download the file and redirected me to the home page. form submit - didn't do anything.
If anyone can give me some insight as to why Spotfire does this and what I can do to stop it from happening it would be greatly appreciated
--Follow up with working code sample for comments request
namespace ACompanyName.SpotFire.ExportWithFilters
{
public class ExportWithFiltersWebPromptControl : CustomWizardPromptControl
{
public ExportWithFiltersWebPromptControl(ExportWithFiltersFileSettings settings)
{
this.AddPage(new ExportWithFiltersPage(settings));
}
private class ExportWithFiltersPage : CustomWizardPromptControlPage
{
private readonly ExportWithFiltersFileSettings _settings;
public ExportWithFiltersPage(ExportWithFiltersFileSettings settings) : base("Export with Filters")
{
_settings = settings;
}
protected override void OnGetContentsCore(HtmlTextWriter writer)
{
var domain = "https://dev.AURL.com";
var filename = _settings.ExportWithFiltersFileInfo.Name;
var fullFilePath = string.Format("{0}/{1}/{2}", domain, "Exports", filename);
writer.WriteLine("Download Export with Filters", fullFilePath);
}
protected override void OnGetScriptsCore(StringBuilder builder)
{
}
protected override void OnLeavePageCore(FormData data)
{
}
protected override bool OnValidatePromptCore(FormData data)
{
return true;
}
}
}
}

Answer 1

Turned out that Spotfire didn't like putting <button> into the page. Swapped it out with an hyperlink with a target of blank and it worked like a charm. If a button is still desired, stylized div should do the trick.