function validate_text(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}
		}
}