var whitespace = " \t\n\r";
      /****************************************************************/
      // Check whether string s is empty.
      function isEmpty(s)
      {
		  return ((s == null) || (s.length == 0))
	  }
      /****************************************************************/
  function isWhitespace (s)
      {   var i;	               
           if (isEmpty(s)) return true;           
           for (i = 0; i < s.length; i++)
           {
              var c = s.charAt(i);
			  if (whitespace.indexOf(c) == -1) return false;
           }
           return true;
      }
	  
function validate(webinar)
	{
	var name=document.webinar.name.value;
	var name=document.webinar.company.value;
	var email=document.webinar.email.value;
	var msg=document.webinar.comments.value;
	if(isWhitespace(name) == true)
	{
	alert("name field cannot be blank");
	document.webinar.name.focus();
	return false;
	}
	if(isWhitespace(company) == true)
	{
	alert("company field cannot be blank");
	document.webinar.company.focus();
	return false;
	}
	if(isWhitespace(email) == true)
	{
	alert("e-mail field cannot be blank");
	document.webinar.email.focus();
	return false;
	}
	//else{return val(email);}
	else{var res=val(email);if(res==false){document.webinar.email.focus();return false;}}
	if(isWhitespace(msg) == true)
	{
	alert("comments field cannot be blank");
	document.webinar.comments.focus();
	return false;
	}
	return true;
	}
	
function val(string) 
	{
	if (string.search(/^\w+((-\w+)|(\.\w+))*\@[A-Za-z0-9]+((\.|-)[A-Za-z0-9]+)*\.[A-Za-z0-9]+$/)== -1)
    {
    alert("Plese provide a valid email id.");
    return false;
    }
}