function echeck(str) {
  var at="@"
  var dot="."
  var lat=str.indexOf(at)
  var lstr=str.length
  var ldot=str.indexOf(dot)
  if (str.indexOf(at)==-1){
     alert("Invalid E-mail address")
     return false
  }
  if (str.indexOf(at)==-1 || str.indexOf(at)==0 || str.indexOf(at)==lstr){
     alert("Invalid E-mail address")
     return false
  }
  if (str.indexOf(dot)==-1 || str.indexOf(dot)==0 || str.indexOf(dot)==lstr){
     alert("Invalid E-mail address")
      return false
  }
   if (str.indexOf(at,(lat+1))!=-1){
     alert("Invalid E-mail address")
      return false
   }
   if (str.substring(lat-1,lat)==dot || str.substring(lat+1,lat+2)==dot){
     alert("Invalid E-mail address")
      return false
   }
   if (str.indexOf(dot,(lat+2))==-1){
     alert("Invalid E-mail address")
      return false
   }
   if (str.indexOf(" ")!=-1){
     alert("Invalid E-mail address")
      return false
   }
   return true          
}




function validator(form)
{
		
if (form.name.value == "")
{
alert("Please enter your name.");
form.name.focus();
return (false);
}


if (form.telephone.value == "")
{
alert("Please enter your telephone number.");
form.telephone.focus();
return (false);
}					

	var checkOK = "0123456789()+ ";
	var checkStr = form.telephone.value;
	var allValid = true;
	var validGroups = true;
	var decPoints = 0;
	var allNum = "";
	for (i = 0;  i < checkStr.length;  i++)
	{
	ch = checkStr.charAt(i);
	for (j = 0;  j < checkOK.length;  j++)
	  if (ch == checkOK.charAt(j))
	    break;
	if (j == checkOK.length)
	{
	  allValid = false;
	  break;
	}
	if (ch != ",")
	  allNum += ch;
	}
	if (!allValid)
	{
	alert("Please enter a valid Phone Number");
	form.telephone.focus();
	return (false);
	}

					
	if (echeck(form.email.value)==false){
		form.email.focus()
		return (false);
	}

if (form.email.value == "")
{
alert("Please enter your email.");
form.email.focus();
return (false);
}					



return (true);
}