// Declaring valid date character, minimum year and maximum year
var dtCh= "/";
var minYear=1900;
var maxYear=2100;

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 ValidateDate(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,pos2+5);
		
	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
	}
	
	//validate time string
	
	if ( dtStr.length > pos2+5 )
	{ 
		var timeStr = dtStr.substring(pos2+5);
		if (timeStr.length > 0)
		{
			re = /^[\W](0?[1-9]|1[0-2]):[0-5][0-9]:[0-5][0-9][\W](AM|PM)$/;
			if ( ! re.test(timeStr))
			{
				alert("Please enter valid time!");
				return false;
			}
		}
	}
	
	return true
}


function validateEmail(e) 
{
	re = /(@.*@)|(\.\.)|(^\.)|(^@)|(@$)|(\.$)|(@\.)/;
	re_two = /^.+\@(\[?)[a-zA-Z0-9\-\.]+\.([a-zA-Z]{2,4}|[0-9]{1,3})(\]?)$/;
	if (!e.match(re) && e.match(re_two)) 
	{
	
	    if ( mytrim(e).indexOf(' ') != -1 )
	    {
		   return (false);		
        }
        
        var temp = mytrim(e);
        var l    = e.length;
        var c;
        var tld = ''; 
        for ( c = l ; c > 0 ; c-- )
        { 
           var curchar = temp.substr(c,1);
           if ( curchar  == '.' )
           {
             break;
           }
           else
           {
             tld = curchar + tld;
           }
        }
        if ( ! isNaN(tld) )
        {
           return false;
        }
        else
        {
          return true;
        }
	} 

	return false;
}

function ValidateURL(Url)
{
  return true;
/*  THIS IS BUGGY I THINK SINCE OLGA REPORTED THAT IT DOES NOT ALLOWS 
	re = /^(file|http):\/\/\S+\.(com|net|org|info|biz|ws|us|tv|cc)\/?\S*$/;
	if (re.test(Url))
	{
		return true;
	}
	return false;
	*/
}

function mytrim(s)
{
  var c,newstr,wordfound;
  
  newstr    = "";
  wordfound = false;
  for ( c = 0 ; c < s.length; c++ )
  {
     if ( s.substr(c,1) != " " || wordfound )
     {
       newstr +=  s.substr(c,1)
       wordfound = true;       
     }
  }

  s = newstr;
  newstr = "";
  wordfound = false;
  for ( c = s.length-1  ; c >= 0 ; c-- )
  {
     if ( s.substr(c,1) != " " || wordfound )
     {
       newstr = s.substr(c,1) + newstr;
       wordfound = true;       
     }
  }  
  
  return newstr;
}


function smartLength(s)
{
  var count = 0;
  for ( c = 0 ; c < s.length; c++ )
  {
     var curchar = s.substr(c,1);
     
     thiscount = 1;
     if ( curchar == "\'" ) { thiscount = 7; }
     if ( curchar == "\"" ) { thiscount = 6; }
     if ( curchar == "<" )  { thiscount = 4; }
     if ( curchar == ">" )  { thiscount = 4; }
     
     count = count + thiscount;
     
  }
  
  return count;
  
}


function blank_check(objectname,message)
{

   if ( mytrim(document.getElementById(objectname).value) == '' )
        {
           alert(message);
           document.getElementById(objectname).focus();
           return false;
        }
        
    return true;
}


function smartLength_check(objectname,len,message)
{
  if ( smartLength(document.getElementById(objectname).value) > len )
          {
            alert(message);
            document.getElementById(objectname).focus();
            return false;
          }
        
    return true;
}