function echeck(str) {

	var at="@"
	var dot="."
	var lat=str.indexOf(at)
	var lstr=str.length
	var ldot=str.indexOf(dot)
	if (str.indexOf(at)==-1){
	alert("Invalid E-mail Address\n\nYou are missing the @ sign in your email address.")
	    return false
	}

	if (str.indexOf(at)==-1 || str.indexOf(at)==0 || str.indexOf(at)==lstr){
	alert("Invalid E-mail Address")
	   return false
	}

	if (str.indexOf(dot)==-1 || str.indexOf(dot)==0 || str.indexOf(dot)==lstr){
	alert("Invalid E-mail Address\n\nYou are missing the TLD in your email address\nExample: .com or .co.uk")
	    return false
	}

	 if (str.indexOf(at,(lat+1))!=-1){
	 alert("Invalid E-mail Address")
	    return false
	 }

	 if (str.substring(lat-1,lat)==dot || str.substring(lat+1,lat+2)==dot){
	 alert("Invalid E-mail Address")
	    return false
	 }

	 if (str.indexOf(dot,(lat+2))==-1){
	 alert("Invalid E-mail Address")
	    return false
	 }

	 if (str.indexOf(" ")!=-1){
	 alert("Invalid E-mail Address\n\nSpaces are illegal characters in email addresses\n\nPlease remove all spaces and resubmit.")
	    return false
	 }

	 return true
}