function checkForm()
	{
	if (
	(document.getElementById("txtName").value == "" || document.getElementById("txtName").value == null) || 
	(document.getElementById("txtEmail").value == "" || document.getElementById("txtEmail").value == null) ||
	(document.getElementById("txtDetails").value == "" || document.getElementById("txtDetails").value == null) ||
	(document.getElementById("fromthis").value == "" || document.getElementById("fromthis").value == null)
	) {
      alert("Please complete all fields marked *");
	   return false;
	}
	if (!ValidateEmail(document.getElementById("txtEmail").value))
	{
	alert("Please check your email address is correct.");
	return false;
	}
	return true;
	}
	function ValidateEmail(email)
	{
	var patEmail = /^[-._&0-9a-zA-Z]+[@][-._&0-9a-zA-Z]+[.][._0-9a-zA-Z]+[a-zA-Z]$/;
	return patEmail.exec(email) != null;
	}