/**
	 * Check Date Functions
	 */
	// Declaring valid date character, minimum year and maximum year
	var dtCh = "/";
	var minYear = 1900;
	var maxYear = 4000;
	
	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){
		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
	}

	
	/*
	* Validation email function
	*/
	function checkEmail(str) {

		 var at="@"
		 var dot="."
		 var lat=str.indexOf(at)
		 var lstr=str.length
		 var ldot=str.indexOf(dot)
		
		 if(str.length < 5) return false;
		
		 if (str.indexOf(at)==-1) return false;

 		 if (str.indexOf(at)==-1 || str.indexOf(at)==0 || str.indexOf(at)==lstr) return false;

		 if (str.indexOf(dot)==-1 || str.indexOf(dot)==0 || str.indexOf(dot)==lstr)  return false;

		 if (str.indexOf(at,(lat+1))!=-1) return false;

		 if (str.substring(lat-1,lat)==dot || str.substring(lat+1,lat+2)==dot) return false;

		 if (str.indexOf(dot,(lat+2))==-1) return false;
		
		 if (str.indexOf(" ")!=-1)  return false;

 		 return true					
	}