/*Function to check valid email address*/
function isValidEmail(email, required) {
    if (required==undefined) {   // if not specified, assume it's required
        required=true;
    }
    if (email==null) {
        if (required) {
            return false;
        }
        return true;
    }
    if (email.length==0) {  
        if (required) {
            return false;
        }
        return true;
    }
    if (! allValidChars(email)) {  // check to make sure all characters are valid
        return false;
    }
    if (email.indexOf("@") < 1) { //  must contain @, and it must not be the first character
        return false;
    } else if (email.lastIndexOf(".") <= email.indexOf("@")) {  // last dot must be after the @
        return false;
    } else if (email.indexOf("@") == email.length) {  // @ must not be the last character
        return false;
    }
	
    return true;
}

function allValidChars(email) {
  var parsed = true;
  var validchars = "abcdefghijklmnopqrstuvwxyz0123456789@.-";
  for (var i=0; i < email.length; i++) {
    var letter = email.charAt(i).toLowerCase();
    if (validchars.indexOf(letter) != -1)
      continue;
    parsed = false;
    break;
  }
  return parsed;
}

/*Delete Message*/
function delvarify(del_id,del_page)
   {
   	  if(confirm("Are you sure you want to delete this Record"))
	  {
	     window.location.href=del_page+"&id="+del_id;
	  }
   }
   function addKeyword(){
document.getElementById('hide_row').style.display=''
document.getElementById('hide_explanation').style.display=''
}
function doValidation() {
	
	email = document.getElementById("email");
	
	if (email.value.search(/\S/) == -1){
	hideAllErrors();
	document.getElementById("blank_emailError").style.display = "inline";
	document.getElementById("email").select();
	document.getElementById("email").focus();
	return false; 
	}
	else{
	
	if(!checkMail(document.getElementById("email").value)){
	hideAllErrors();
	document.getElementById("emailError").style.display = "inline";
	document.getElementById("email").select();
	document.getElementById("email").focus();
	return false; 
	}
	}
	
	}
	function hideAllErrors() {
	document.getElementById("blank_emailError").style.display = "none"
	document.getElementById("emailError").style.display = "none"
	}