/*

	function trim(inputString) 

	function ValidateDate(txt)

	function ValidateEMailID(txt)

*/

// START the "trim" function

function trim(inputString) 

{

		// Removes leading and trailing spaces from the passed string. Also removes

		// consecutive spaces and replaces it with one space. If something besides

		// a string is passed in (null, custom object, etc.) then return the input.

		if (typeof inputString != "string") { return inputString; }

		

		var retValue = inputString;

		var ch = retValue.substring(0, 1);

		

		while (ch == " ")

		{ // Check for spaces at the beginning of the string

			retValue = retValue.substring(1, retValue.length);

			ch = retValue.substring(0, 1);

		}

		

		ch = retValue.substring(retValue.length-1, retValue.length);

		

		while (ch == " ") 

		{ // Check for spaces at the end of the string

			retValue = retValue.substring(0, retValue.length-1);

			ch = retValue.substring(retValue.length-1, retValue.length);

		}

		

		while (retValue.indexOf("  ") != -1) 

		{ // Note that there are two spaces in the string - look for multiple spaces within the string

			retValue = retValue.substring(0, retValue.indexOf("  ")) + retValue.substring(retValue.indexOf("  ")+1, retValue.length); // Again, there are two spaces in each of the strings

		}

		

		return retValue; // Return the trimmed string back to the user

} 

// END the "trim" function





// START Date Validation Function 

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 isDate(dtStr){

	var daysInMonth = DaysArray(12);

	var pos1=dtStr.indexOf(dtCh);

	var pos2=dtStr.indexOf(dtCh,pos1+1);

	var strDay=dtStr.substring(0,pos1);

	var strMonth=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 : dd/mm/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 ValidateDate(txt){

	var dt=document.getElementById(txt);

	if (isDate(dt.value)==false){

		dt.focus();

		return false;

	}

    return true;

 }

//END Date Validation Function 







 // START DHTML email validation script. Courtesy of SmartWebby.com (http://www.smartwebby.com/dhtml/) 

 //(http://www.smartwebby.com/DHTML/email_validation.asp)

 

function echeck(str) {



		var at="@";

		var dot=".";

		var lat=str.indexOf(at);

		var lstr=str.length;

		var ldot=str.indexOf(dot);

		if (str.indexOf(at)==-1){

		   alert("Invalid E-mail ID");

		   return false;

		}



		if (str.indexOf(at)==-1 || str.indexOf(at)==0 || str.indexOf(at)==lstr){

		   alert("Invalid E-mail ID");

		   return false;

		}



		if (str.indexOf(dot)==-1 || str.indexOf(dot)==0 || str.indexOf(dot)==lstr){

		    alert("Invalid E-mail ID");

		    return false;

		}



		 if (str.indexOf(at,(lat+1))!=-1){

		    alert("Invalid E-mail ID");

		    return false;

		 }



		 if (str.substring(lat-1,lat)==dot || str.substring(lat+1,lat+2)==dot){

		    alert("Invalid E-mail ID");

		    return false;

		 }



		 if (str.indexOf(dot,(lat+2))==-1){

		    alert("Invalid E-mail ID");

		    return false;

		 }

		

		 if (str.indexOf(" ")!=-1){

		    alert("Invalid E-mail ID");

		    return false;

		 }



 		 return true;				

	}



function ValidateEMailID(txt){

	var emailID=document.getElementById(txt);

	

	if ((emailID.value==null)||(trim(emailID.value)=="")){

		alert("Please Enter your Email ID");

		emailID.focus();

		return false;

	}

	if (echeck(emailID.value)==false){

		emailID.value="";

		emailID.focus();

		return false;

	}

	return true;

 }

 // END  DHTML email validation script.