function validate()

	{
		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
}

		var frm = document.form1;

		if(frm.sno.value=="")
		
		{
			alert("Please Enter subscription Number !")
			
			frm.sno.focus()
			
			return false
			
		}
		 else if(isNaN(frm.sno.value)==true)
 		{
   		alert("Please enter Subscription Number in digits");
		return false;
		}
		
		 else if(frm.mrank.value=="")
		
		{
			alert("Please Enter Military Rank !")
			
			frm.mrank.focus()
			
			return false
			
		}
		
		else if(frm.fname.value=="")

		{

			alert("Please Enter First Name !")

			frm.fname.focus()

			return false

		}
		
		else if(frm.sname.value=="")

		{

			alert("Please Enter Surname !")

			frm.sname.focus()

			return false

		}
		else if(frm.title.value=="")
		
		{
			alert("Please Enter Title !")
			
			frm.title.focus()
			
			return false
			
		}
		else if(frm.company.value=="")
		
		{
			alert("Please Enter Company Name !")
			
			frm.company.focus()
			
			return false
			
		}
		else if(frm.street.value=="")

		{

			alert("Please Enter street Name!")

			frm.street.focus()

			return false

		}
		else if(frm.pbox.value=="")

		{

			alert("Please Enter Post Box Number!")

			frm.pbox.focus()

			return false

		}
		else if(frm.pcode.value=="")

		{

			alert("Please Enter the Postal code!")

			frm.pcode.focus()

			return false

		}
		 else if(isNaN(frm.pcode.value)==true)
 		{
   		alert("Please enter Postal code in digits");
		return false;
		}
		
		
		else if(frm.town.value=="")

		{

			alert("Please Enter Town Name!")

			frm.town.focus()

			return false

		}
		
		else if(frm.state.value=="")

		{

			alert("Please enter Country or State Name!")

			frm.state.focus()

			return false

		}
		else if(frm.country.value=="")

		{

			alert("Please select a country!")

			frm.country.focus()

			return false

		}
		
		
		
		
		else if(frm.email.value=="")

		{

			alert("Please Enter Valid Email!")

			frm.email.focus()

			return false

		}
		
		else if(frm.email.value.indexOf("@") && frm.email.value.indexOf(".")==-1)
		{
			alert("Plese Enter a Valid Email-ID");
			frm.email.focus();
			return false;
		}
		
	
	   else
		return true

	}
	
	<!--------------subscriptiiom validation----->
	
	function subscrpvalidate()

	{

		var frm = document.form2;
		
		
		  if(frm.mrank.value=="")
		
		{
			alert("Please Enter Military Rank !")
			
			frm.mrank.focus()
			
			return false
			
		}
		
		else if(frm.fname.value=="")

		{

			alert("Please Enter First Name !")

			frm.fname.focus()

			return false

		}
		
		else if(frm.sname.value=="")

		{

			alert("Please Enter Surname !")

			frm.sname.focus()

			return false

		}
		else if(frm.title.value=="")
		
		{
			alert("Please Enter Title !")
			
			frm.title.focus()
			
			return false
			
		}
		else if(frm.company.value=="")
		
		{
			alert("Please Enter Company Name !")
			
			frm.company.focus()
			
			return false
			
		}
		else if(frm.street.value=="")

		{

			alert("Please Enter street Name!")

			frm.street.focus()

			return false

		}
		else if(frm.pbox.value=="")

		{

			alert("Please Enter Post Box Number!")

			frm.pbox.focus()

			return false

		}
		else if(frm.pcode.value=="")

		{

			alert("Please Enter the Postal code!")

			frm.pcode.focus()

			return false

		}
		 else if(isNaN(frm.pcode.value)==true)
 		{
   		alert("Please enter Postal code in digits");
		return false;
		}
		
		
		else if(frm.town.value=="")

		{

			alert("Please Enter Town Name!")

			frm.town.focus()

			return false

		}
		
		else if(frm.state.value=="")

		{

			alert("Please enter Country or State Name!")

			frm.state.focus()

			return false

		}
		else if(frm.country.value=="")

		{

			alert("Please select a country!")

			frm.country.focus()

			return false

		}
		
		
		
		
		else if(frm.email.value=="")

		{

			alert("Please Enter Valid Email!")

			frm.email.focus()

			return false

		}
		
		else if(frm.email.value.indexOf("@") && frm.email.value.indexOf(".")==-1)
		{
			alert("Plese Enter a Valid Email-ID");
			frm.email.focus();
			return false;
		}
		
		else if(frm.cardname.value=="")

		{

			alert("Please Enter a Card Number!");

			frm.cardname.focus()

			return false

		}
		else if(isNaN(frm.cardname.value)==true)
 		{
   		alert("Please enter  Card Number in digits");
		return false;
		}
		
	
	else if(isDate(frm.expdate.value)==false)
	{
		frm.expdate.focus()
		return false
	}
   
		else if(frm.name.value=="")

		{

			alert("Please  enter a Card Name!")

			frm.name.focus()

			return false

		}
		else if(frm.address.value=="")

		{

			alert("Please enter Address!")

			frm.address.focus()

			return false

		}
	
	   else
		return true

	}