function IsSpace(field) {
	ic_spaces = false;
	for (pos = 0;pos < field.length;pos ++)
		if (field.charAt(pos) != " ")
			ic_spaces = true;

	if (!ic_spaces)
		return true;

	return false;
}


function validamail(mail) {
	invalidChars = " /:,;"

	if (mail == "") {						
		return false
	}
	for (i=0; i<invalidChars.length; i++) {	
		badChar = invalidChars.charAt(i)
		if (mail.indexOf(badChar,0) > -1) {
			return false
		}
	}
	atPos = mail.indexOf("@",1)			
	if (atPos == -1) {
		return false
	}
	if (mail.indexOf("@",atPos+1) != -1) {	
		return false
	}
	periodPos = mail.indexOf(".",atPos)
	if (periodPos == -1) {					
		return false
	}
	if (periodPos+3 > mail.length)	{		
		return false
	}
	return true
}