function validate_required(field,alerttxt)
	{
	with (field)
		{
	  	if (value==null||value=="")
	  		{
	  		alert(alerttxt);return false;
	  		}
			  else
				  {
				  return true;
				  }
		}
	}
function validate_email(field,alerttxt)
	{
	with (field)
	{
		apos=value.indexOf("@");
		dotpos=value.lastIndexOf(".");
		if (apos<1||dotpos-apos<2) 
		  {alert(alerttxt);return false;}
			else {return true;}
		}
	}

function validate_form(thisform)
	{
	with (thisform)
		{
			if (validate_required(Name,"Please enter your name")==false)
			  {Name.focus();return false;}
			if (validate_email(Email,"Not a valid e-mail address!")==false)
			  {Email.focus();return false;}

		}
	}