function validateEmail(email){
	if (/^\w+([\.-]?\w+)*@\w+([\.-]?\w+)*(\.\w{2,3})+$/.test(email))
		return true
	return false
}

function validateEmail2(email){
	if(email.indexOf("@")<1 || email.indexOf("@")==email.length-1)
		return false
	if(email.indexOf(".")<1 || email.indexOf(".")==email.length-1)
		return false
	if(email.indexOf("@",(email.indexOf("@")+1))!=-1)
		return false
	if(email.substring(email.indexOf("@")-1,email.indexOf("@"))==".")
		return false
	if(email.substring(email.indexOf("@")+1,email.indexOf("@")+2)==".")
		return false
	if(email.indexOf(".",(email.indexOf("@")+2))==-1)
		return false
	if(email.indexOf(" ")!=-1)
		return false
	return true
}