//trim function
function trim(inputString) 
{
	if (typeof inputString != "string") 
	{ 
		return inputString; 
	}
	var retValue = inputString;
	var ch = retValue.substring(0, 1);
	while (ch == " ") 
	{
		retValue = retValue.substring(1, retValue.length);
		ch = retValue.substring(0, 1);
	}
	ch = retValue.substring(retValue.length-1, retValue.length);
	while (ch == " ") 
	{
		retValue = retValue.substring(0, retValue.length-1);
		ch = retValue.substring(retValue.length-1, retValue.length);
	}
	while (retValue.indexOf("  ") != -1) 
	{
		retValue = retValue.substring(0, retValue.indexOf("  ")) + retValue.substring(retValue.indexOf("  ")+1, retValue.length);
	}
	return retValue;
}               
///end  

///email validation

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					
}
////end

///start date
function isDate(dtStr,chYN)
{
var dtCh= "/";
var minYear=1900;
var Digital=new Date()
var tday=Digital.getDate()
var tmonth=Digital.getMonth()+1
var maxYear=Digital.getYear();
var tmaxYear=Digital.getYear()-17;        
//function Start
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
}
//end
    if (dtStr=="")
    {
        alert("Please Enter Value For Date")
        return false
    }

    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 date. (dd/mm/yyyy Format)")
        return false
    }
    
    if (strDay.length<1 || day<1 || day>31 || (month==2 && day>daysInFebruary(year)) || day > daysInMonth[month])
    {
        alert("Please enter a valid date. (dd/mm/yyyy Format)")
        return false
    }
    
    if (strYear.length != 4 || year==0 || year<=minYear)
    {
        alert("Please enter a valid 4 Digit Year and between "+ minYear+" to "+ maxYear)
        return false
    }
    
    if (dtStr.indexOf(dtCh,pos2+1)!=-1 || isInteger(stripCharsInBag(dtStr, dtCh))==false)
    {
        alert("Please enter a valid date. (dd/mm/yyyy Format)")
        return false
    }
    
    if(chYN==1)
    {
        if((day>tday && month>tmonth && year>maxYear)||((day>=tday ||day<tday) && month>tmonth && year>=maxYear)||(year>maxYear)||((day>tday) &&(month>=tmonth) &&(year>=maxYear)))
        {
            alert("Date Can't Be Greater Than Current Date")
            return false
        }
    }
       
    else if(chYN==0)
    {
			if((day<tday && month<tmonth && year<maxYear)||((day<=tday ||day<tday) && month<=tmonth && year<=maxYear)||(year<maxYear)||((day<tday) &&(month<=tmonth) &&(year<=maxYear)))
        {
            alert("Expiry Date of Passport Can't Be Less Than Current Date")
            return false
        }
    }
    
	 return true
}