var MSGTIMER = 5;
var MSGSPEED = 20;
var MSGOFFSET = 0;
var MSGHIDE = 1;

// build out the divs, set attributes and call the fade function //
function inlineMsg(target,string,autohide,setfocusOn,setfocus) {
	var msg;
  	var msgcontent;
	var bodyObj = document.getElementById('jsControl');
  	setfocus = (setfocus) ? setfocus : '1';
  	if(!document.getElementById('msg')){
    	msg = document.createElement('DIV');
    	msg.id = 'msg';
    	msgcontent = document.createElement('DIV');
    	msgcontent.id = 'msgcontent'; 
    	bodyObj.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);  
	if (document.getElementById(setfocusOn)) {
	  	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);
 	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
 	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;
}
arrow = new Image(); 
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.fieldSC = new Array(); //check for special character
	this.fieldSV = new Array(); //message for special character
}

function validateForm(formN, objvar){
	var err = "";
	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 == 0)  || (frmElm.value == '--' )) {
					
				inlineMsg(objvar.fieldI[i],objvar.fieldV[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.fieldN[i].indexOf("Email") >= 0) || (objvar.fieldN[i].indexOf("email") >= 0)) {
				if(!checkEmail(frmElm.value)) {
					inlineMsg(objvar.fieldI[i],'Please enter valid email address',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.fieldSC[i]){
				var frmElm = eval("frmObj." + objvar.fieldN[i]);
				var Val = frmElm.value.length;
				var DataVal = frmElm.value;
				var result = true;
				var iChars = "*|,\":<>[]{}`\';()&$#%";
				for (var p = 0; p < Val; p++) {
					if(iChars.indexOf(DataVal.charAt(p)) != -1){
						result = false;
					}
				}
				if (result == false){
					inlineMsg(objvar.fieldI[i],objvar.fieldSV[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){
				alert('here');
				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;
			}
		}		
		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(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] == "validate"){
			var frmElm = eval("frmObj." + objvar.fieldN[i]);
			inlineMsg(objvar.fieldI[i],objvar.fieldV[i],3,objvar.fieldFocus[i],objvar.setFocus[i]);
			return false;
		}
		
	}
	return true;
}
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;
}

function check_login(frmName){
	var objVar = new getObjVars();
	var frmObj = document.login;
		objVar.fieldI[0] = 'email';
	objVar.fieldN[0] = 'email';
	objVar.fieldV[0] = "Email field cannot be left empty";
	objVar.fieldT[0] = "text";
		objVar.fieldI[1] = 'username';
	objVar.fieldN[1] = 'username';
	objVar.fieldV[1] = "Username field cannot be left empty";
	objVar.fieldT[1] = "text";
	objVar.fieldSC[1] = "1";
	objVar.fieldSV[1] = "No special characters are allowed";
	if(validateForm('login',objVar)){
		authenticate(frmName);
	}
	return false;
}

function check_register(frmName){
	var objVar = new getObjVars();
	var frmObj = document.register;
		objVar.fieldI[0] = 'reg_firstname';
	objVar.fieldN[0] = 'reg_firstname';
	objVar.fieldV[0] = "First name field cannot be left empty";
	objVar.fieldT[0] = "text";
		objVar.fieldI[1] = 'reg_lastname';
	objVar.fieldN[1] = 'reg_lastname';
	objVar.fieldV[1] = "Last name field cannot be left empty";
	objVar.fieldT[1] = "text";
		objVar.fieldI[2] = 'reg_email';
	objVar.fieldN[2] = 'reg_email';
	objVar.fieldV[2] = "Email field cannot be left empty";
	objVar.fieldT[2] = "text";
		objVar.fieldI[3] = 'reg_email_confirm';
	objVar.fieldN[3] = 'reg_email_confirm';
	objVar.fieldV[3] = "Re-Email field cannot be left empty";
	objVar.fieldT[3] = "text";
	objVar.fieldCF[3] = 'reg_email';
	objVar.fieldCM[3] = 'Emails do not match';
		objVar.fieldI[4] = 'reg_username';
	objVar.fieldN[4] = 'reg_username';
	objVar.fieldV[4] = "Username field cannot be left empty";
	objVar.fieldT[4] = "text";
	objVar.fieldSC[4] = "1";
	objVar.fieldSV[4] = "No special characters are allowed";
		objVar.fieldI[5] = 'reg_mem_no';
	objVar.fieldN[5] = 'reg_mem_no';
	objVar.fieldV[5] = "Mem. No. field cannot be left empty";
	objVar.fieldT[5] = "text";
	if(validateForm('register',objVar)){
		register(frmName);
	}
	return false;
}

function check_adminlogin(frmName){
	var objVarad = new getObjVars();
	var frmObj = document.admin;
		objVarad.fieldI[0] = 'admin_password';
	objVarad.fieldN[0] = 'admin_password';
	objVarad.fieldV[0] = "Email field cannot be left empty";
	objVarad.fieldT[0] = "text";
		objVarad.fieldI[1] = 'admin_username';
	objVarad.fieldN[1] = 'admin_username';
	objVarad.fieldV[1] = "Username field cannot be left empty";
	objVarad.fieldT[1] = "text";
	objVarad.fieldSC[1] = "1";
	objVarad.fieldSV[1] = "No special characters are allowed";
	
	if(validateForm('admin',objVarad)){
		adminAuthenticate(frmName);
	}
	return false;
}