function validpwd(str)
{
		invalidChars = " "
		if (str == "") 
		{
			return (false);
		}
		for (i=0; i<invalidChars.length; i++) 
		{
			badChar = invalidChars.charAt(i)
			if (str.indexOf(badChar,0) != -1) 
			{
				return (false);
			}
		}
		return(true);
}

function emailCheck (emailStr) 
{

	var checkTLD=1;

	var knownDomsPat=/^(com|net|org|edu|int|mil|gov|arpa|biz|aero|name|coop|info|pro|museum)$/;

	var emailPat=/^(.+)@(.+)$/;
	
	var specialChars="\\(\\)><@,;:\\\\\\\"\\.\\[\\]";
	
	var validChars="\[^\\s" + specialChars + "\]";

	var quotedUser="(\"[^\"]*\")";

	var ipDomainPat=/^\[(\d{1,3})\.(\d{1,3})\.(\d{1,3})\.(\d{1,3})\]$/;

	var atom=validChars + '+';

	var word="(" + atom + "|" + quotedUser + ")";

	var userPat=new RegExp("^" + word + "(\\." + word + ")*$");

	var domainPat=new RegExp("^" + atom + "(\\." + atom +")*$");

	var matchArray=emailStr.match(emailPat);

	if (matchArray==null) 
	{
		alert("Please enter a valid e-mail address.");
		return false;
	}
	var user=matchArray[1];
	var domain=matchArray[2];

	for (i=0; i<user.length; i++) 
	{
		if (user.charCodeAt(i)>127) 
		{
			alert("Ths username contains invalid characters.");
			return false;
		}
	}
	for (i=0; i<domain.length; i++) 
	{
		if (domain.charCodeAt(i)>127) 
		{
			alert("Ths domain name contains invalid characters.");
			return false;
		}
	}

	if (user.match(userPat)==null) 
	{
		alert("The username doesn't seem to be valid.");
		return false;
	}
	 
/* if the e-mail address is at an IP address (as opposed to a symbolic
host name) make sure the IP address is valid. */

	var IPArray=domain.match(ipDomainPat);
	if (IPArray!=null) 
	{
		for (var i=1;i<=4;i++) 
		{
			if (IPArray[i]>255) 
			{
				alert("Destination IP address is invalid!");
				return false;
			}
		}
	}
	var atomPat=new RegExp("^" + atom + "$");
	var domArr=domain.split(".");
	var len=domArr.length;
	for (i=0;i<len;i++) 
	{
		if (domArr[i].search(atomPat)==-1) 
		{
			alert("The domain name does not seem to be valid.");
			return false;
   		}
	}
	
	if (checkTLD && domArr[domArr.length-1].length!=2 && domArr[domArr.length-1].search(knownDomsPat)==-1)
	{
		alert("The address must end in a well-known domain or two letter " + "country.");
		return false;
	}
	if (len<2)
	{
		alert("This address is missing a hostname!");
		return false;
	}
	return true;
}

function checkFields()
{
if(document.form1.username.value=="")
{
alert("Please enter e-mail.")
document.form1.username.focus();
return false;
}

if(!emailCheck(document.form1.username.value))
{
document.form1.username.focus();
return false;
}

if(document.form1.password.value=="")
{
alert("Please enter password.");
document.form1.password.focus();
return false;
}

}