// Verify Form 3
// Author: Scott Jackman
// Original: 	14/2/07
// Last Update:	6/1/10
/////////////////////////////////////////////////////////////////////////////////
//
//		Mark fields in the form you want to verify by adding to the class attribute, "VF" plus any combination of the following letters:
//		MANDATORY	- mandatory field
//		EMAIL 		- correct email address format
//		NUMBER		- numerals only
//		ALPHA		- alpha only
//		PHONE		- allows the inclusion of brackets () and + common in phone numbers
//		DEPENDANT	- dependant field set - at least one must be chosen (eg radio buttons)
//
//		The "title" attribute of the input field can be used to define a message that will be shown if the field does not verify
//
//		Examples:
//			<input type="text" name="Name" value="" class="input MANDATORY" title="Please fill in your name">
//			(mandatory field)
//
//			<input type="text" name="Email" value="" class="input EMAIL" title="Please enter a valid email address">
//			(optional field that if filled out, must be a valid email)
//
//			<input type="text" name="Phone" value="" class="input MANDATORY PHONE">
//			(mandatory field, and can contain only phone number - (numbers, brackets and spaces))
//
//		
//
//
/////////////////////////////////////////////////////////////////////////////////
function verifyform(check_scope) {
// note: when disp is true the class of the field will NOT be changed
// note: if 'output' is given (this will be an object), the script will output any messages to this object instead of an alert
var error = "";
var chkFlds = ["input","select","textarea","checkbox"];
var dependencies = new Object();
// loop thru field types - chkFlds
for (var j=0; j < chkFlds.length; j++) {
	// get all the fields for the current type into array
	var frmObjs = check_scope.getElementsByTagName(chkFlds[j]);
	// loop thru type array
	for (var i=0; i < frmObjs.length; i++) {
		var displayname = (frmObjs[i].title == "")?frmObjs[i].name:frmObjs[i].title;
		var type = frmObjs[i].type;
			// if not resetting, get value and alt from current object
			var fldVal = frmObjs[i].value;
			var fldClassName = frmObjs[i].className;
			var thiserror = 0;
			if (frmObjs[i].disabled !== true) {
				var fldVfy = fldClassName;// .substr(fldClassName.indexOf('VF')+2);
				// Check for empty mandatory fields - m
				if (fldVal == "" && fldVfy.indexOf("MANDATORY")!=-1) {
					verify_flag_error(frmObjs[i]);
					error += "   Required: "+displayname+'\n';
					thiserror = 1;
					}
				// check for unticked checkbox - m
				if (type == "checkbox" && fldVfy.indexOf("MANDATORY")!=-1 && frmObjs[i].checked !== true) {
					verify_flag_error(frmObjs[i]);
					error += "   Unticked checkbox: "+displayname+'\n';
					thiserror = 1;
					}
					
				// Check for non numeral - n
				var numerror = 0;
				var numerals = "-0123456789. \r\n";
				if (fldVal !== "" && fldVfy.indexOf("NUMBER")!=-1) {
					for (k=0; k<fldVal.length; k++) {
						var ch = fldVal.charAt(k);
						var x = numerals.indexOf(ch);
						if (x == -1) {
							numerror = 1;
							} 
						}
					if (numerror == 1) {
						verify_flag_error(frmObjs[i]);
						error += "   Numbers only: "+displayname+'\n';
						thiserror = 1;
						}
					}
		
				// Check for non phone number - p
				var phoneerror = 0;
				var numerals = "0123456789.+() \r\n";
				if (fldVal !== "" && fldVfy.indexOf("PHONE")!=-1) {
					for (k=0; k<fldVal.length; k++) {
						var ch = fldVal.charAt(k);
						var x = numerals.indexOf(ch);
						if (x == -1) {
							phoneerror = 1;
							} 
						}
					if (phoneerror == 1) {
						verify_flag_error(frmObjs[i]);
						error += "   Phone numbers only: "+displayname+'\n';
						thiserror = 1;
						}
					}
		
		
				// Check for non alpha - a
				var alphaerror = 0;
				var numerals = "0123456789. ";
				if (fldVal !== "" && fldVfy.indexOf("ALPHA")!=-1) {
					for (k=0; k<fldVal.length; k++) {
						var ch = fldVal.charAt(k);
						var x = numerals.indexOf(ch);
						if (x !== -1) {
							alphaerror = 1;
							} 
						}
					if (alphaerror == 1) {
						verify_flag_error(frmObjs[i]);
						error += "   Numbers not allowed: "+displayname+'\n';
						thiserror = 1;
						}
					}
				// Check for password confirmation
				if (fldVfy.indexOf("PASSCHECK")!=-1) {
					var p1 = document.getElementById('P1');
					var p2 = document.getElementById('P2');
					//if(p1.value != '' && p2.value != ''){ // dont need this check cos if they are both blank, then they match!
						if(p1.value != p2.value){
							error += "   Password doesn't match! Please retype.\n";
							//p2.value = '';
							verify_flag_error(p2,"Password doesn't match! Please retype." );
							thiserror = 1;
							} else {
							verify_unflag_error(p2);	
							}
						//}
		
					}
		
		
				// Check for incorrect email address - e
				if (fldVal !== "" && fldVfy.indexOf("EMAIL")!=-1) {
					var at =  fldVal.indexOf("@");
					var dot = fldVal.indexOf(".");
					if (at==-1 || dot==-1) {
						verify_flag_error(frmObjs[i]);
						error += "   Incorrect email address: "+displayname+'\n';
						thiserror = 1;
						}
					}
					
					
				// Check for dependant field - a field set where at least one field must be filled out
				if (fldVfy.indexOf("DEPENDANT")!=-1) {
					var did = fldVfy.substr(fldVfy.indexOf("DEPENDANT"),2);
					if(!dependencies[did]){
						dependencies[did] = new Object();
						dependencies[did]['verified'] = false;
						dependencies[did]['fieldlist'] = '';
						dependencies[did]['msg'] = (type == 'radio')?'   Please choose a '+ displayname +':\n':'   At least one of these fields must be completed:\n';
						}
					var unchecked = ((type == "checkbox" || type == "radio")&& frmObjs[i].checked == false)?true:false;
					if(fldVal == '' || unchecked){
						if(type=="radio"){
							dependencies[did]['fieldlist'] += '     - '+fldVal+'\n';
							} else {
							dependencies[did]['fieldlist'] += '     - '+displayname+'\n';
							}
						} else {
						dependencies[did]['verified'] = true;
						}
					}				
			// If field ok, set colour to normal
				if (thiserror!=1) {					
					verify_unflag_error(frmObjs[i]);
					}
				}
			}
		}
	// loop through dependencies object
	for(var d in dependencies){
		if(!dependencies[d]['verified']){
			thiserror = 1;
			error += dependencies[d]['msg'];
			error += dependencies[d]['fieldlist']+'\n';
			}
		}


// If errors, give error alert, otherwise, submit the form
	if (!error == "") {
		//alert(error);
		// the following only works with prototype / scriptaculous library
		$$('div.error_message').each(function(e){
											  //alert(e);
											  Effect.BlindDown(e.id, {duration: 0.3});
											  });
		return false;
		} else {
		return true;
		}
}
function verify_flag_error(obj,msg){
	var cc = obj.className;
	if(cc.indexOf('VERIFY_ERROR') == -1){
		obj.className = obj.className+" VERIFY_ERROR";
		var em = document.createElement('div');
		em.className = "error_message";
		em.setAttribute('style', 'display:none;');
		em.setAttribute('id', 'errmsg_'+obj.name);
		if(obj.nextSibling){
			obj.parentNode.removeChild(obj.nextSibling);
			}
		if(msg != null){
			em.appendChild(document.createTextNode(msg));
			} else {
			em.appendChild(document.createTextNode(obj.title));
			}
		obj.parentNode.appendChild(em);
	}
}
function verify_unflag_error(obj){
	var cc = obj.className;
	if(cc.indexOf('VERIFY_ERROR') != -1){
		obj.className = cc.replace("VERIFY_ERROR","");
		obj.parentNode.removeChild(obj.nextSibling);
	}
}