function checkForm(thisform)
  {
	//validate the email
	var reEmailAddress = /^([A-Za-z0-9_\-\.])+\@([A-Za-z0-9_\-\.])+\.([A-Za-z]{2,4})$/;
	if(thisform.entemail.value=='' || thisform.entemail.value=="Your Email")
    {
		  alert("Email field is required. Please fill it in.");
		  thisform.entemail.value='';		  
		  thisform.entemail.focus();
		  return false;
    }
    if(!reEmailAddress.test(thisform.entemail.value))
    {
		  alert("The email you entered is not valid. \nPlease enter an email in the form of\nyouremail@domain.com");
		  thisform.entemail.value='';		  
		  thisform.entemail.focus();
		  return false;
    }
	
    //if all is OK submit the form
    thisform.submit();
  }