It’s also important to note that many ADA-related lawsuits have been successful, further stressing the urgency of making your website as compliant as possible sooner rather than later. Because there is a clear lack of regulations, companies should not feel secure that courts will rule in their favor, should things escalate to that level. In short, you are probably more than likely required to comply and should take all necessary precautions.
The Americans with Disabilities Act (ADA) gives civil rights protections to individuals with disabilities that are like those provided to individuals on the basis of race, sex, national origin, and religion. It guarantees equal opportunity for individuals with disabilities in employment, public accommodations, transportation, State and local government services, and telecommunications.
This guide features a series of technical bulletins covering requirements for accessible routes in Chapter 4 of the ADA and ABA Standards, including doors and gates, ramps and curb ramps, and elevators and platform lifts. There is also a bulletin on referenced requirements for accessible means of egress. The documents explain and illustrate requirements in the standards, answer common questions, and offer best practice recommendations.
In 1986, the National Council on Disability had recommended the enactment of an Americans with Disabilities Act (ADA) and drafted the first version of the bill which was introduced in the House and Senate in 1988. The final version of the bill was signed into law on July 26, 1990, by President George H. W. Bush. It was later amended in 2008 and signed by President George W. Bush with changes effective as of January 1, 2009.[3]
As of 2015 the ADA had improved access to public services, the built environment (e.g., crosswalks with curb cuts and accessible pedestrian signals), understanding of the abilities of people with disabilities, established a right to equal access to public services and has demonstrated the contributions which people with disabilities can make to the economy. Disparities have remained in employment, earned income, Internet access, transportation, housing, and educational attainment and the disabled remain at a disadvantage with respect to health and health care.[45]
The ADA states that a covered entity shall not discriminate against a qualified individual with a disability. This applies to job application procedures, hiring, advancement and discharge of employees, worker's compensation, job training, and other terms, conditions, and privileges of employment - FAQ and Americans with Disabilities Act - ADA Employment Information
The fastest, most certain way to be sure your website is in compliance is to contact a qualified web design agency and have them perform an audit of all your online properties. Make sure you interview the agency thoroughly first, as not all agencies are up to speed on ADA website compliance rules. A qualified web design firm will be able to identify any violations of ADA Website Compliance and outline a plan for updating your online content and properties. 
Poorly designed websites can create unnecessary barriers for people with disabilities, just as poorly designed buildings prevent some people with disabilities from entering. Access problems often occur because website designers mistakenly assume that everyone sees and accesses a webpage in the same way. This mistaken assumption can frustrate assistive technologies and their users. Accessible website design recognizes these differences and does not require people to see, hear, or use a standard mouse in order to access the information and services provided.
In 2010, the DOJ issued an Advanced Notice of Proposed Rulemaking (ANPRM) called the Nondiscrimination on the Basis of Disability; Accessibility of Web Information and Services of State and Local Government Entities and Public Accommodations.  An ANPRM is not law but a published notice in the Federal Register used by an agency to feel out its proposal and get feedback/comments before making it a rule; It’s a prudent move by federal agencies to try and get everything right before making a law.

If you have a disability and are qualified to do a job, the ADA protects you from job discrimination on the basis of your disability. Under the ADA, you have a disability if you have a physical or mental impairment that substantially limits a major life activity. The ADA also protects you if you have a history of such a disability, or if an employer believes that you have such a disability, even if you don't.
* Alterations must be accessible. When alterations to primary function areas are made, an accessible path of travel to the altered area (and the bathrooms, telephones, and drinking fountains serving that area) must be provided to the extent that the added accessibility costs are not disproportionate to the overall cost of the alterations. Elevators are required as described above.
Two agencies within the U.S. Department of Labor enforce parts of the ADA. The Office of Federal Contract Compliance Programs (OFCCP) has coordinating authority under the employment-related provisions of the ADA. The Civil Rights Center (CRC) is responsible for enforcing Title II of the ADA as it applies to the labor- and workforce-related practices of state and local governments and other public entities. Visit the Laws & Regulations subtopic for specific information on these provisions.