// Author: Stuart Cochrane
// URL: www.freecontactform.com
// Email: stuartc1@gmail.com
// Date: 3rd July 2007
// Version: 3.0 Beta
// License: Free to use and edit, but all comments must remain intact.
 
// SPECIFY ALL REQUIRED FIELDS AND
// VALIDATION TYPE

// EXAMPLES:
// one or more characters
// required.add('[ FIELDID ]', 'NOT_EMPTY');
// alpha characters, no spaces
// required.add('[ FIELDID ]', 'ALPHA');
// alpha characters, accept spaces
// required.add('[ FIELDID ]', 'ALPHASPACE');
// numeric characters, no spaces
// required.add('[ FIELDID ]', 'NUMERIC');
// numeric characters, also accepts +-.
// required.add('[ FIELDID ]', 'NUMERICPLUS');
// alpha and numeric characters, no spaces
// required.add('[ FIELDID ]', 'ALPHANUM');
// alpha and numeric characters, accept spaces
// required.add('[ FIELDID ]', 'ALPHANUMSPACE');
// email address
// required.add('[ FIELDID ]', 'EMAIL');
// date format yyyy-mm-dd, accepts - or / separators
// required.add('[ FIELDID ]', 'YYYYMMDD');
// date format dd-mm-yyyy, accepts - or / separators
// required.add('[ FIELDID ]', 'DDMMYYYY');
// date format mm-dd-yyyy, accepts - or / separators
// required.add('[ FIELDID ]', 'MMDDYYYY');
// enter own regular expression, example: '^[0-9]{3}$'
// required.add('[ FIELDID ]', '[ REGULAR EXPRESSION ]');

// NOTES:
// [ FIELD ID ] = REPLACE WITH ACTUAL FIELD ID VALUE
// example: <input type="text" name="THIS" ID="THIS"> = THIS

// to specify your own regular expression,
// enter the literal regex as type
// example: required.add('fieldid', '^[0-9]{3}$');
// note: no leading or preceeding / (slash) is required!


function $$(id) {
try {
var tmp = document.getElementById(id).value;
}
catch(e) {
alert("Field " + id + " does not exist!\nvalidation is configured on a field with no ID.");
return false;
}
if(tmp == "") {
alert("Field '" + id + "' cannot be empty.");
return false;
}
return tmp;
}

var required = {
field : [],
add : function(name, type) {
this.field[this.field.length] = [name,type];
},
out : function() {
return this.field;
}
}

var validate = {

check : function() {
var tmp;
// loop all required fields
for(var i=0; i<required.field.length; i++) {
// check the form field exists
this.tmp = $$(required.field[i][0]);
if(this.tmp) {
if(this.checkit(required.field[i][0],required.field[i][1])) {
// validated okay
} else {
alert("Field '"+required.field[i][0]+"' not valid. Please try again.\n");
document.getElementById(required.field[i][0]).focus();
return false;
}
} else {
try {
document.getElementById(required.field[i][0]).focus();
} catch(e) { }
return false;
}
} // for
return true;
},

checkit : function(value,type) {
exp : '';
switch(type) {

case "NOT_EMPTY":
if(this.trim($$(value)).length < 1) { return false; } else { return true; }
break;

case "ALPHA":
exp = /^[A-Za-z]+$/;
if($$(value).match(exp)==null) { return false; } else { return true; }
break;

case "ALPHASPACE":
exp = /^[A-Za-z ]+$/;
if($$(value).match(exp)==null) { return false; } else { return true; }
break;

case "NUMERIC":
exp = /^[0-9]+$/;
if($$(value).match(exp)==null) { return false; } else { return true; }
break;

case "NUMERICPLUS":
exp = /(^-*\d+$)|(^-*\d+\.\d+$)/;
if($$(value).match(exp)==null) { return false; } else { return true; }
break;

case "ALPHANUM":
exp = /^[a-zA-Z0-9]+$/;
if($$(value).match(exp)==null) { return false; } else { return true; }
break;

case "ALPHANUMSPACE":
exp = /^[a-zA-Z0-9 ]+$/;
if($$(value).match(exp)==null) { return false; } else { return true; }
break;

case "EMAIL":
exp = /^[a-zA-Z0-9._%-]+@[a-zA-Z0-9.-]+\.[a-zA-Z]{2,4}$/;
if($$(value).match(exp)==null) { return false; } else { return true; }
break;

case "YYYYMMDD":
exp = /^(19|20)[0-9][0-9][- /.](0[1-9]|1[012])[- /.](0[1-9]|[12][0-9]|3[01])$/;
if($$(value).match(exp)==null) { return false; } else { return true; }
break;

case "DDMMYYYY":
exp = /^(0[1-9]|[12][0-9]|3[01])[- /.](0[1-9]|1[012])[- /.](19|20)[0-9][0-9]$/;
if($$(value).match(exp)==null) { return false; } else { return true; }
break;

case "MMDDYYYY":
exp = /^(0[1-9]|1[012])[- /.](0[1-9]|[12][0-9]|3[01])[- /.](19|20)[0-9][0-9]$/;
if($$(value).match(exp)==null) { return false; } else { return true; }
break;

default:
exp = new RegExp(type);
if($$(value).match(exp)==null) { return false; } else { return true; }
} // switch
},
trim : function(s) {
return s.replace(/^\s+/, '').replace(/\s+$/, '');
}

}
function $val(id) {
return document.getElementById(id);
}
function trim(id) {
$val(id).value = $val(id).value.replace(/^\s+/, '').replace(/\s+$/, '');
}