function validate() 
{
	if (document.contact.fname.value.length==0)
	{
		alert("Please enter your First name");
		document.contact.fname.focus();
		return false;
	}
	if (document.contact.lname.value.length==0)
	{
		alert("Please enter your Last name");
		document.contact.lname.focus();
		return false;
	}
	if(!nvalidatePhone(document.contact.business_phone.value))
	{
		alert ("Please enter your valid phone number including zip code");
		document.contact.business_phone.focus();
		return false
	}
	if(!nvalidateEmail(document.contact.email.value)) 
    { 
    	alert("Please enter your valid email address"); 
		document.contact.email.focus();
        return false; 
    }  
	if (document.contact.comments.value.length==0)
	{
		alert("Please enter your comments so that we may assist you");
		document.contact.comments.focus();
		return false;
	}
	
return true;
     }
      
function nvalidatePhone(business_phone)
{
    var stripped = business_phone.value.replace(/[\(\)\.\-\ ]/g, '');     

   if (business_phone.value == "") {
        return false;
    } else if (isNaN(parseInt(stripped))) {
        return false;
    } else if (!(stripped.length == 10)) {
        return false;
    } 
	else
    	return true;
}

function nvalidateEmail(email)
{
    var splitted = email.match("^(.+)@(.+)$");
    if(splitted == null) return false;
    if(splitted[1] != null )
    {
      var regexp_user=/^\"?[\w-_\.]*\"?$/;
      if(splitted[1].match(regexp_user) == null) return false;
    }
    if(splitted[2] != null)
    {
      var regexp_domain=/^[\w-\.]*\.[A-Za-z]{2,4}$/;
      if(splitted[2].match(regexp_domain) == null) 
      {
	    var regexp_ip =/^\[\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}\]$/;
	    if(splitted[2].match(regexp_ip) == null) return false;
      }// if
      return true;
    }
return false;
}