function checkvalidate()
{
   if (document.expertform.lname.value == "")
  {
     alert("You must provide your last name.");
	 document.expertform.lname.focus();
	 return false;
  } 
  if (document.expertform.fname.value == "")
  {
     alert("You must provide your first name.");
	 document.expertform.fname.focus();
	 return false;
  } 
    if (document.expertform.phone.value == "")
  {
     alert("You must provide your business phone.");
	 document.expertform.phone.focus();
	 return false;
  } 
    if (document.expertform.email.value == "")
  {
     alert("You must provide your email address.");
	 document.expertform.email.focus();
	 return false;
  } 
	 var chkemail = document.expertform.email.value;
    if (chkemail.length>0) 
	{
       if (chkemail.length<8||
           chkemail.indexOf("@")== -1||
           chkemail.indexOf(".")== -1||
		  // chkemail.indexOf(".") > chkemail.indexOf("@") ||
           chkemail.indexOf(" ")!= -1) {
           alert("\nThe e-mail address you entered is not in the correct format.\n\nYour e-mail address must be in the form xxx@yyy.zzz");
           document.expertform.email.focus(); 
		   document.expertform.email.select() ; 
           return false;
        } 
	}
	 if (document.expertform.interestarea.value == "")
  {
     alert("You must submit your area of interest as an expert.");
	 document.expertform.interestarea.focus();
	 return false;
  } 

}