/*
	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= txt
	
	if ((emailID==null)||(trim(emailID)==""))
	{
		alert("Please Enter your Email ID");
		emailID.focus();
		return false;
	}
	if (echeck(emailID.value)==false)
	{
		emailID="";
		emailID.focus();
		return false;
	}
	return true;
}
 
function isInteger (s)
{
   var i;

   if (isEmpty(s))
   if (isInteger.arguments.length == 1) return 0;
   else return (isInteger.arguments[1] == true);

   for (i = 0; i < s.length; i++)
   {
      var c = s.charAt(i);

      if (!isDigit(c)) return false;
   }
   return true;
}

function isEmpty(s)
{
   return ((s == null) || (s.length == 0))
}

function isDigit (c)
{
   return ((c >= "0") && (c <= "9"))
}