var dtCh= "/";
var minYear=1900;
var maxYear=2200;

function checkdate(d,m,y) 
{ 
  var yl=1990;   // least year to consider 
  var ym=2010;   // most year to consider 
  if (m<1 || m>12)  return(false); 
  if (d<1 || d>31)  return(false); 
  if (y<yl || y>ym) return(false); 
  if (m==4 || m==6 || m==9 || m==11) 
    if (d==31) return(false); 
  if (m==2) 
  { 
    var b=parseInt(y/4); 
    if (isNaN(b)) return(false); 
    if (d>29)     return(false); 
    if (d==29 && ((y/4)!=parseInt(y/4))) return(false); 
  } 
  return(true); 
} 



function isInteger(s){
	var i;
    for (i = 0; i < s.length; i++){   
        // Check that current character is number.
        var c = s.charAt(i);
        if (((c < "0") || (c > "9"))) return false;
    }
    // All characters are numbers.
    return true;
}

function stripCharsInBag(s, bag){
	var i;
    var returnString = "";
    // Search through string's characters one by one.
    // If character is not in bag, append to returnString.
    for (i = 0; i < s.length; i++){   
        var c = s.charAt(i);
        if (bag.indexOf(c) == -1) returnString += c;
    }
    return returnString;
}

function daysInFebruary (year){
	// February has 29 days in any year evenly divisible by four,
    // EXCEPT for centurial years which are not also divisible by 400.
    return (((year % 4 == 0) && ( (!(year % 100 == 0)) || (year % 400 == 0))) ? 29 : 28 );
}
function DaysArray(n) {
	for (var i = 1; i <= n; i++) {
		this[i] = 31
		if (i==4 || i==6 || i==9 || i==11) {this[i] = 30}
		if (i==2) {this[i] = 29}
   } 
   return this
}

function isDate(dtStr){
	
	var daysInMonth = DaysArray(12)
	var pos1=dtStr.indexOf(dtCh)
	var pos2=dtStr.indexOf(dtCh,pos1+1)
	var strMonth=dtStr.substring(0,pos1)
	var strDay=dtStr.substring(pos1+1,pos2)
	var strYear=dtStr.substring(pos2+1)
	strYr=strYear
	if (strDay.charAt(0)=="0" && strDay.length>1) strDay=strDay.substring(1)
	if (strMonth.charAt(0)=="0" && strMonth.length>1) strMonth=strMonth.substring(1)
	for (var i = 1; i <= 3; i++) {
		if (strYr.charAt(0)=="0" && strYr.length>1) strYr=strYr.substring(1)
	}
	month=parseInt(strMonth)
	day=parseInt(strDay)
	year=parseInt(strYr)
	if (pos1==-1 || pos2==-1){
		alert("The date format should be : mm/dd/yyyy")
		return false
	}
	if (strMonth.length<1 || month<1 || month>12){
		alert("Please enter a valid month")
		return false
	}
	if (strDay.length<1 || day<1 || day>31 || (month==2 && day>daysInFebruary(year)) || day > daysInMonth[month]){
		alert("Please enter a valid day")
		return false
	}
	if (strYear.length != 4 || year==0 || year<minYear || year>maxYear){
		alert("Please enter a valid 4 digit year between "+minYear+" and "+maxYear)
		return false
	}
	if (dtStr.indexOf(dtCh,pos2+1)!=-1 || isInteger(stripCharsInBag(dtStr, dtCh))==false){
		alert("Please enter a valid date")
		return false
	}
return true
}


function ValidateForm(frmSample)
{
	var dt=document.frmSample.start_date;
	
	var dt1=document.frmSample.end_date;
	
		
	if (dt.value == "")
	{
		alert ("Start Date can not be empty")
		return false
	}
	if (dt1.value == "")
	{
		alert ("End Date can not be empty")
		return false
	}
	if (isDate(dt.value)==false ){
		dt.focus()
		return false
	}
	
	if (isDate(dt1.value)==false ){
		dt1.focus()
		return false
	}
	
	if(diffDate(dt,dt1)==false )
	{
		return false
	}
	
	
	
    return true
 }
 
 function ValidateForm1(frmSearch)
 {
 	var dt=document.frmSearch.start_date;
 	
 	var dt1=document.frmSearch.end_date;
 	
 		
 	
 	if (dt.value != "" )
 	{
 		
 		
 		if (isDate(dt.value)==false ){
 		dt.focus()
 		return false
 		}
 	}
 	
 	if (dt1.value != "" )
 	{
 	
 	if (isDate(dt1.value)==false ){
 		dt1.focus()
 		return false
 	}
 	}
 	
 	if(dt.value != "" && dt1.value != "")
 	{
 	
 	if(diffDate(dt,dt1)==false )
 	{
 		return false
 	}
 	}
 	
 	
 	
     return true
 }
 
 
 function ValidateForm2(frmUpdate)
  {
  	var dt=document.frmUpdate.start_date;
  	
  	var dt1=document.frmUpdate.end_date;
  	
  		
  	if (dt.value == "")
  	{
  		alert ("Start Date can not be empty")
  		return false
  	}
  	if (dt1.value == "")
  	{
  		alert ("End Date can not be empty")
  		return false
  	}
  	if (isDate(dt.value)==false ){
  		dt.focus()
  		return false
  	}
  	
  	if (isDate(dt1.value)==false ){
  		dt1.focus()
  		return false
  	}
  	
  	if(diffDate(dt,dt1)==false )
  	{
  		return false
  	}
  	
  	
  	
      return true
 }
 
 
 function diffDate(from, to)
 {
 	var f = new Date(from.value);
 	var n = new Date(to.value);
 	
	if(f-n <= 0) 	 
	{
		return true
	}
	
	else
	{
 	alert("End Date can be earlier than the Start Date.")
 	
 	return false;
 	}
 	
 
 }


function valForm(regFrm)
{
	var name1=document.regFrm.name;
	if(name1.value == "")
	{
		alert ("Organization name can not be empty");
		return false;
	}
	
	var phone1 = document.regFrm.phone1;
	if(phone1.value == "")
	{
		alert ("Organization Phone number can not be empty");
		return false;
	}
	
	return true;



}

function ValidateFrm(form)
{

   
   
   //var box = form.elements[1];
  	
   //alert('You haven\'t filled in ' + box.name + '!')
  	
  	var x = form.elements;
  	
  	 	
	for (var i=0;i<x.length;i++)
	{
		if (IsEmpty(x[i]))
		{
			
			alert ('This field is required :' + x[i].name);
			return false;  
		}
	}
	
	   	
     
       if(IsEmpty(form.phone)) 
          { 
             alert('You have not entered Phone number ') 
             form.phone.focus(); 
             return false; 
          } 
       
        if(IsEmpty(form.email)) { 
		alert("You must provide an Email address"); 
		form.email.focus(); 
		return false; 
	} 
  
	
      	
       var emailString = form.email.value
       
            
       var cnt = emailString.indexOf("@")
       var cnt1 =emailString.indexOf(".")
       
       		
   	if (cnt > 0 )
   	{ 
		if(cnt1 > 2)
		  {	
		  	return true;
		  }
		else
		{
		alert("Your Email address is not valid"); 
		form.email.focus(); 
		return false; 
		}
	  
	  
   	} 
   	
   	else
   	{
   		
   		alert("Your Email address is not valid"); 
   		return false;
   	}
      
       
     return true;
 
} 

function ValidateFrmB(form)
{

   
   
   //var box = form.elements[1];
  	
   //alert('You haven\'t filled in ' + box.name + '!')
  	
  	var x = form.elements;
        var emptyfieldstring = "";
        var hasemptyfield = false;
        var pwdstring = "";
        var confirmpwdstring = "";
  	 	
	for (var i=0;i<x.length;i++)
	{
		if (IsEmpty(x[i]))
		{
			var myclass = x[i].getAttribute("class");
                        if (myclass == "reqdfield") {
                          hasemptyfield = true;
                          emptyfieldstring += x[i].id;
                          emptyfieldstring += "\n";
                        }
		}
                if (x[i].name=="pwd") {
                  pwdstring = x[i].value;
                }
                if (x[i].name=="confirm_pwd") {
                  confirmpwdstring = x[i].value;
                }
	}
	if (hasemptyfield) {
          alert("ERROR: The following required fields are missing:\n\n"
                + emptyfieldstring);
          return false;
        }
		/*Bapa - I made the change below March 31 2006. it didn't seem to change anything so I left it in here. jb*/
		alert("Your Username and Password have been accepted press OK to proceed\n");
        /*alert ("pwdstring="+pwdstring+"\nconfirmpwdstring="+confirmpwdstring);*/
        if (confirmpwdstring != pwdstring) {
          alert("ERROR: Password and Confirm Password do not match");
          return false;
        }
	return true;
} /*function ValidateFrmB(form)*/

function gotoRegPage(selectvalue)
{
  if (selectvalue == "") {
    alert("Please make a choice from the Drop down menu");
    return false;
  }
  if (selectvalue == "Educators" ||
      selectvalue == "Parents" ||
      selectvalue == "Yoga Instructors") {
    window.location = "teach_memb_reg.html";
    return true;
  }
  if (selectvalue == "Yoga Ed. Trainer" ||
      selectvalue == "Yoga Ed. Instructor") {
    window.location = "inst_member_reg.html";
    return true;
  }
  return false; 
} /*function gotoRegPage(selectvalue)*/

function IsEmpty(aTextField) {
   if ((aTextField.value.length==0) ||
   (aTextField.value==null)) {
      return true;
   }
   else { return false; }
}	

function isValidEmail(str) {
   return (str.indexOf(".") > 2) && (str.indexOf("@") > 0);
 
}




function IsNumeric(sText)
{
   var ValidChars = "0123456789.";
   var IsNumber=true;
   var Char;

 
   for (i = 0; i < sText.length && IsNumber == true; i++) 
      { 
      Char = sText.charAt(i); 
      if (ValidChars.indexOf(Char) == -1) 
         {
         IsNumber = false;
         }
      }
   return IsNumber;
   
   }