var MSGTIMER = 20;
var MSGSPEED = 20;
var MSGOFFSET = 5;
var MSGHIDE = 3;

// build out the divs, set attributes and call the fade function //
function inlineMsg(target,string,autohide,setfocusOn,setfocus) {
  var msg;
  var msgcontent;
  
  setfocus = (setfocus) ? setfocus : '1';
    
  if(!document.getElementById('msg')) {
    msg = document.createElement('div');
    msg.id = 'msg';
    msgcontent = document.createElement('div');
    msgcontent.id = 'msgcontent';    
    document.body.appendChild(msg);
    msg.appendChild(msgcontent);
    msg.style.filter = 'alpha(opacity=0)';
    msg.style.opacity = 0;
    msg.alpha = 0;
  } else {
    msg = document.getElementById('msg');
    msgcontent = document.getElementById('msgcontent');
  }
  msgcontent.innerHTML = string;
  msg.style.display = 'block';  
  var msgheight = msg.offsetHeight;
  var targetdiv = document.getElementById(target);  
  var setfocusOnObj = document.getElementById(setfocusOn);  
  if (setfocus == 1){
 	setfocusOnObj.focus();  
  }
  var targetheight = targetdiv.offsetHeight;
  var targetwidth = targetdiv.offsetWidth;
  var topposition = topPosition(targetdiv) - (((msgheight - targetheight) / 2) - 3);
  var leftposition = leftPosition(targetdiv) + targetwidth + MSGOFFSET;
  msg.style.top = topposition + 'px';
  msg.style.left = leftposition + 'px';
  clearInterval(msg.timer);
  msg.timer = setInterval("fadeMsg(1)", MSGTIMER);
  if(!autohide) {
    autohide = MSGHIDE;  
  }
	// The following line has been commented so that the message doesnt hide after a few secs
   window.setTimeout("hideMsg()", (autohide * 1000)); 
}

// hide the form alert //
function hideMsg(msg) {
  var msg = document.getElementById('msg');
  if(!msg.timer) {
    msg.timer = setInterval("fadeMsg(0)", MSGTIMER);
  }
}

// face the message box //
function fadeMsg(flag) {
  if(flag == null) {
    flag = 1;
  }
  var msg = document.getElementById('msg');
  var value;
  if(flag == 1) {
    value = msg.alpha + MSGSPEED;
  } else {
    value = msg.alpha - MSGSPEED;
  }
  msg.alpha = value;
  msg.style.opacity = (value / 100);
  msg.style.filter = 'alpha(opacity=' + value + ')';
  if(value >= 99) {
    clearInterval(msg.timer);
    msg.timer = null;
  } else if(value <= 1) {
    msg.style.display = "none";
    clearInterval(msg.timer);
  }
}

// calculate the position of the element in relation to the left of the browser //
function leftPosition(target) {
  var left = 0;
  if(target.offsetParent) {
    while(1) {
      left += target.offsetLeft;
      if(!target.offsetParent) {
        break;
      }
      target = target.offsetParent;
    }
  } else if(target.x) {
    left += target.x;
  }
  return left;
}

// calculate the position of the element in relation to the top of the browser window //
function topPosition(target) {
  var top = 0;
  if(target.offsetParent) {
    while(1) {
      top += target.offsetTop;
      if(!target.offsetParent) {
        break;
      }
      target = target.offsetParent;
    }
  } else if(target.y) {
    top += target.y;
  }
  return top;
}

// preload the arrow //
if(document.images) {
  arrow = new Image(7,80); 
  arrow.src = "images/msg_arrow.gif"; 
}

function getObjVars(){
	this.fieldN = new Array();	// Field name	
	this.fieldI = new Array();	// Field Id	
	this.fieldT = new Array();	// Field type (text, editor, checkbox, radio, select, mselect, date)	
	this.fieldV = new Array();	// Error message to be dispayed
	this.fieldCF = new Array();	// Check for equal field
	this.fieldCV = new Array();	// To check if field value is equal to a specific value. Give error if field value <> specified value
	this.fieldCVE = new Array(); // To check if field value is equal to a specific value. Give error if field value == specified value	
	this.fieldCM = new Array();	// Error message to be displayed after comparing two fields 
	this.fieldFocus = new Array(); // Set focus to this field, always give the ID of the field
	this.setFocus = new Array(); // whether to set focus to this field, if not specified it takes as 'yes'
	this.fieldValidate = new Array(); // this is specially used if you want to validate the field
	this.fieldValidateMsg = new Array(); // message
	this.fieldNumeric = new Array(); // if set as 1 checks for numeric value
	this.fieldText = new Array(); // if set as 1 checks for text
	this.fieldAllowSpace = new Array(); //if set as 1 checks for text, allows space aswell
	this.fieldAlphaNumeric = new Array(); //check alphanumeric if set as 1
}

function validateForm(formN, objvar){
	var err = "";
	var returnVal = "";
	var msgArr = new Array();

	var frmObj = eval("document." + formN);
	for(var i=0; i<objvar.fieldN.length; i++){			
		objvar.setFocus[i] = (objvar.setFocus[i]) ? objvar.setFocus[i] : 1;
		objvar.fieldFocus[i] = (objvar.fieldFocus[i]) ? objvar.fieldFocus[i] : objvar.fieldI[i];		
		objvar.fieldValidate[i] = (objvar.fieldValidate[i]) ? objvar.fieldValidate[i] : "";		
		if ( (objvar.fieldT[i] == "text") || (objvar.fieldT[i] == "select")){	
			var frmElm = eval("frmObj." + objvar.fieldN[i]);	
			if((frmElm.value == "") || (frmElm.value == " ") || (frmElm.value == "select") || (frmElm.value == "your email") || (frmElm.value == "your message") || (frmElm.value == 0)) {							
 				inlineMsg(objvar.fieldI[i],objvar.fieldV[i],3,objvar.fieldFocus[i],objvar.setFocus[i]);
    			return false;
			}else if ((objvar.fieldN[i].indexOf("E-Mail") >= 0) || (objvar.fieldN[i].indexOf("email") >= 0)) {
				if(!checkEmail(frmElm.value)) {
					inlineMsg(objvar.fieldI[i],'Ungültige E-Mail Adresse',3,objvar.fieldFocus[i],objvar.setFocus[i]);
    				return false;
				}else if (objvar.fieldValidate[i]){					
					inlineMsg(objvar.fieldI[i],objvar.fieldValidateMsg[i],3,objvar.fieldFocus[i],objvar.setFocus[i]);
    				return false;
				}
				
			}else if(objvar.fieldCF[i]){
				var frmCElm = eval("frmObj." + objvar.fieldCF[i]);
				if(frmElm.value != frmCElm.value){					
					inlineMsg(objvar.fieldI[i],objvar.fieldCM[i],3,objvar.fieldFocus[i],objvar.setFocus[i]);
    				return false;
				}
			}else if(objvar.fieldCV[i]){
				if(frmElm.value != objvar.fieldCV[i]){					
					inlineMsg(objvar.fieldI[i],objvar.fieldCM[i],3,objvar.fieldFocus[i],objvar.setFocus[i]);
    				return false;
				}
			}else if(objvar.fieldCVE[i]){
				if (frmElm.value == objvar.fieldCVE[i]){	
					var dis_msg = (objvar.fieldCM[i]) ? objvar.fieldCM[i] : objvar.fieldV[i];
					inlineMsg(objvar.fieldI[i],dis_msg,3,objvar.fieldFocus[i],objvar.setFocus[i]);
					return false;
				}
			}else if (objvar.fieldValidateMsg[i] == 1){
				var dis_msg = (objvar.fieldValidateMsg[i]) ? objvar.fieldValidateMsg[i] : objvar.fieldV[i];
				inlineMsg(objvar.fieldI[i],dis_msg,3,objvar.fieldFocus[i],objvar.setFocus[i]);
				return false;
			}else if (objvar.fieldNumeric[i]){
				if(!isNumeric(frmElm.value)){
	 				inlineMsg(objvar.fieldI[i],objvar.fieldNumeric[i],3,objvar.fieldFocus[i],objvar.setFocus[i]);
					return false;
				}
			}else if (objvar.fieldText[i]){
				if(!isAlpha(frmElm.value)){
	 				inlineMsg(objvar.fieldI[i],objvar.fieldText[i],3,objvar.fieldFocus[i],objvar.setFocus[i]);
					return false;
				}
			}else if (objvar.fieldAlphaNumeric[i]){
				if((isNumeric(frmElm.value)) || (isAlpha(frmElm.value))){
	 				inlineMsg(objvar.fieldI[i],objvar.fieldAlphaNumeric[i],3,objvar.fieldFocus[i],objvar.setFocus[i]);
					return false;
				}
			}else if (objvar.fieldAllowSpace[i]){
				returnVal = "";
				returnVal = allowSpace(frmElm.value,objvar.fieldN[i]);
				msgArr[0] = objvar.fieldText[i];
				msgArr[1] = objvar.fieldAllowSpace[i];

				if(returnVal !== true){
	 				inlineMsg(objvar.fieldI[i],msgArr[returnVal],3,objvar.fieldFocus[i],objvar.setFocus[i]);
					return false;
				}
			}
		}		
		if(objvar.fieldT[i] == "radio"){
			var frmElm = eval("frmObj." + objvar.fieldN[i]);
			var checkedI = false;
			var tol_options = frmElm.length;			
			for(var j=0; j< frmElm.length; j++) {
				if(frmElm[j].checked == true) {
					checkedI = true;
					if(objvar.fieldN[i].indexOf("learning_disability") >= 0 && frmElm[j].value == 1){
						if(!checkDisability()){
			 				inlineMsg(objvar.fieldI[i],"As you selected Yes in this question, please select an option under 'Disability' and/or 'Learning Difficulty'",3,objvar.fieldFocus[i],objvar.setFocus[i]);
							return false;
						}
					}
				}
			}			
			if(checkedI === false) {
				inlineMsg(objvar.fieldI[i],objvar.fieldV[i],3,objvar.fieldFocus[i],objvar.setFocus[i]);
				return false;
			}
		}
		
// 		if(objvar.fieldT[i] == "checkbox"){
// 			var frmElm = eval("frmObj." + objvar.fieldN[i]);
// 			if(frmElm.checked === false) {
// 				inlineMsg(objvar.fieldI[i],objvar.fieldV[i],3,objvar.fieldFocus[i],objvar.setFocus[i]);
// 				return false;
// 			}
// 		}
		
		if(objvar.fieldT[i] == "checkbox"){
			var frmElm = eval("frmObj." + objvar.fieldN[i]);
			var checkedI = false;
			var tol_options = frmElm.length;			
			for(var j=0; j< frmElm.length; j++) {
				if(frmElm[j].checked == true) {
					checkedI = true;
				}
			}			
			if(checkedI === false) {
				inlineMsg(objvar.fieldI[i],objvar.fieldV[i],3,objvar.fieldFocus[i],objvar.setFocus[i]);
				return false;
			}
		}
		if(objvar.fieldT[i] == "validate"){
			var frmElm = eval("frmObj." + objvar.fieldN[i]);
			inlineMsg(objvar.fieldI[i],objvar.fieldV[i],3,objvar.fieldFocus[i],objvar.setFocus[i]);
			return false;
		}
		
		if(objvar.fieldT[i] == "captcha"){
			if (grecaptcha.getResponse() == ""){
				//inlineMsg(objvar.fieldI[i],objvar.fieldV[i],3,objvar.fieldFocus[i],objvar.setFocus[i]);
				return false;
			}
		}
	}
	return true;
}

function demo(){
	var objVar = new getObjVars();
	objVar.fieldN[0] = "demofieldName1";
	objVar.fieldV[0] = "demofield1 error message to be displayed";
	objVar.fieldT[0] = "text";
	objVar.fieldI[0] = "demofieldId1";
	
	objVar.fieldN[1] = "demofieldName2";
	objVar.fieldV[1] = "demofield2 error message to be displayed";
	objVar.fieldT[1] = "text";
	objVar.fieldI[1] = "demofieldId2";
	return validateForm('formName',objVar);	
}

function update(counterObj,textObj,limit) {
	var old = counterObj.value;
	counterObj.value = textObj.value.length;
	if(counterObj.value >= limit) {
		alert('Maximum '+limit+' characters only!');
		if(document.styleSheets) {
			counterObj.style.fontWeight = 'bold';
			counterObj.style.color = '#ff0000'; 
		} 
		textObj.value = textObj.value.substring(0,limit);
		counterObj.value = textObj.value.length;
	}else if(counterObj.value < limit && old > limit && document.styleSheets ) {
		counterObj.style.fontWeight = 'normal';
		counterObj.style.color = '#000000'; 
	} 
}

function getAge(){
	var bday = parseInt(document.academyForm.day.value);
	var bmo = (parseInt(document.academyForm.month.value)-1);
	var byr = parseInt(document.academyForm.year.value);
	var byr;
	var age;
	var now = new Date();
	tday = now.getDate();
	tmo = (now.getMonth());
	tyr = (now.getFullYear());
	
	if((tmo > bmo)||(tmo==bmo & tday>=bday)){
		age = byr;
	}else{
		age = byr+1;
	}
// 		alert("As of today, "+now+' \n'+", you are:"+(tyr-age)+ " years old");
		document.academyForm.age.value =  (tyr-age);

}

function checkDisability(){
	var disabilityObj = document.academyForm.disability;
	var learningObj = document.academyForm.learning_disabilities;
	if(disabilityObj.value=="select" && learningObj.value=="select"){
		return false;
	}else{
		return true;
	}
}

function isNumeric(objectVal){
	var numericExpression = /^[0-9 ]+$/;
 	if(objectVal.match(numericExpression)){
	 	return true;
 	}else{
	 	return false;
 	}
}

function isAlpha(objectVal){
	var numericExpression = /^[a-zA-Z]+$/;
 	if(objectVal.match(numericExpression)){
	 	return true;
 	}else{
	 	return false;
 	}
}

function allowSpace(objectVal,obj){
	var numericExpression = /^[a-zA-Z ]+$/;
 	if(objectVal.match(numericExpression)){
	 	if(obj.indexOf("nursery_manager")>=0){
		 	var splitArr = objectVal.split(" ");
		 	if(splitArr.length>1 && splitArr[1] != ""){
			 	return true;
		 	}else{
			 	return 0;
		 	}
	 	}else{
		 	return true;
	 	}
 	}else{
	 	return 1;
 	}
}

function isAlphaNumeric(objectVal){
	var expression = /^[0-9a-zA-Z ]+$/;
 	if(objectVal.match(expression)){
	 	return true;
 	}else{
	 	return false;
 	}
}
function checkEmail(fieldValue){
	var chkAt = fieldValue.indexOf("@");
	var chkDot= fieldValue.indexOf(".");
	var chkHack= fieldValue.indexOf("@.");
	var chkHackA= fieldValue.indexOf(".@");

	if((chkAt >= 0) && (chkDot >= 0) && (chkHack == -1) && (chkHackA == -1) ) {
		return true;
	}
	return false;
}