function validEmail (emailval) {
        errorcount = 1;
	invalidchar = " /:,;~!#$%^*()=+" ;
	for ( i = 0; i < invalidchar.length; i++ ) 
        {
		badchar = invalidchar.charAt(i);
		if ( emailval.indexOf(badchar, 0) > -1 ) 
			errorcount = 0;
	}
	atposition = emailval.indexOf("@", 1 );
	if ( atposition == -1 ) 
		errorcount = 0;
	if ( emailval.indexOf("@", atposition+1) > -1 ) 
		errorcount = 0;
	dotpos = emailval.indexOf(".", atposition)
	if ( dotpos == -1 ) 
		errorcount = 0;
	if ( dotpos+3 > emailval.length ) 
		errorcount = 0;
	if ( errorcount == 0 ) 
		return (errorcount);
         else 
		return (errorcount);
}