function ValidateContactForm()
{
    var name = document.ContactForm.Name;
    var email = document.ContactForm.Email;
    var phone = document.ContactForm.Telephone;
    var nocall = document.ContactForm.DoNotCall;
    var what = document.ContactForm.Subject;
    var comment = document.ContactForm.Comment;
    var error=false;

    if (name.value == "")
    {
        //window.alert("Please enter your name.");
  
        name.focus();
         //name.value="Please enter your name";
         name.style.backgroundColor="red";
        //return false;
        error=true;
       
       
       
    }
    
    if (email.value == "")
    {
        //window.alert("Please enter a valid e-mail address.");
        email.focus();
       
        //return false;
        error=true;
    }
    if (email.value.indexOf("@", 0) < 0)
    {
        //window.alert("Please enter a valid e-mail address.");
            
        email.focus();
        email.style.color="red";
        //return false;
error=true;
    }
    if (email.value.indexOf(".", 0) < 0)
    {
        //window.alert("Please enter a valid e-mail address.");
           
        email.focus();
        email.style.color="red";
error=true;        
        //return false;
    }

    if ((nocall.checked == false) && (phone.value == ""))
    {
       // window.alert("Please enter your telephone number.");
        phone.focus();
     //   return false;
        error=true;
    }

    if (what.selectedIndex < 1)
    {
        //alert("Please tell us how we can help you.");
        what.focus();
       // return false;
       error=true;
    }

    if (comment.value == "")
    {
        //window.alert("Please provide a detailed description or comment.");
        comment.focus();
        //return false;
        error=true;
    }
    if (error==false){
    return true;
    } else {
       return false;
       }
}

function EnableDisable(chkbx)
{
    if(chkbx.checked == true)
    {
        document.ContactForm.Telephone.disabled = true;
    }
    else
    {
        document.ContactForm.Telephone.disabled = false;
    }
}