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_required(field,alerttxt)
{
	with (field)
	{
		if (value==null||value=="")
		{
			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;
		}
		else if (validate_required(surname,"Please enter your surname.")==false)
		{
			surname.focus();return false;
		}
		else if (validate_email(email,"Please enter your email adress.")==false)
		{
			email.focus();return false;
		}
	}
}