var curField=2;
function compareDates(dtstr1,dtstr2)
{
   var dtarr = dtstr1.split("/");
   
   var month = dtarr[1]; 
   var day   =  dtarr[0]; 
   var year  = dtarr[2]; 

   var date1 = new Date(month+"/"+day+"/"+year);
   
   var dtarr = dtstr2.split("/");
   
   var month = dtarr[1];
   var day =  dtarr[0];
   var year = dtarr[2];
  
   var date2 = new Date(month+"/"+day+"/"+year);
   
   if(date1 == date2)
	return 0;
   if(date1 > date2)
	return 1;
   else
	return -1;
}


function isBlank(s)
{
	for(i=0;i<s.length;i++)
	{
		if(s.charAt(i)!=" ")
			return false;
	}
	return true;
}




function LeapYear(intYear) 
{
	if (intYear % 100 == 0) 
	{
		if (intYear % 400 == 0) { return true; }
	}
	else 
	{
		if ((intYear % 4) == 0) { return true; }
	}
	return false;
}


function Trim(s) 
{
  // Remove leading spaces and carriage returns
  
  while ((s.substring(0,1) == ' ') || (s.substring(0,1) == '\n') || (s.substring(0,1) == '\r'))
  {
    s = s.substring(1,s.length);
  }

  // Remove trailing spaces and carriage returns

  while ((s.substring(s.length-1,s.length) == ' ') || (s.substring(s.length-1,s.length) == '\n') || (s.substring(s.length-1,s.length) == '\r'))
  {
    s = s.substring(0,s.length-1);
  }
  return s;
}


/*-----------------------------------------------------------------------------------------
This Function checks whether the entered value is numeric. If not numeric it gives an 
alert message.
-----------------------------------------------------------------------------------------*/

function checknumeric()
{
	if ((event.keyCode < 48 || event.keyCode > 57) && event.keyCode!=46 && event.keyCode != 13)
	{
		event.keyCode = 8;
		alert("Please enter numeric value only.");
	}
}

function tchknumeric(thisfield,nextField,len)
{	
	if (curField==thisfield.name) 
	{
		if (thisfield.value.length == len ){nextField.focus()};	
	} 	
	else 
	{
		curField = thisfield.name;
	}
}

/*----------------------------------------------------------------------------------------
This Function checks for valid email.
----------------------------------------------------------------------------------------*/
function ValidEmail(EmailAdd)
{
	var emailStr = EmailAdd;
	var checkTLD=1;
	//var knownDomsPat=/^(com|net|org|edu|int|mil|gov|arpa|biz|aero|name|coop|info|pro|museum)$/;
	var emailPat=/^(.+)@(.+)$/;
	var specialChars="\\(\\)><@,;:\\\\\\\"\\.\\[\\]";
	var validChars="\[^\\s" + specialChars + "\]";
	var quotedUser="(\"[^\"]*\")";
	var ipDomainPat=/^\[(\d{1,3})\.(\d{1,3})\.(\d{1,3})\.(\d{1,3})\]$/;
	var atom=validChars + '+';
	var word="(" + atom + "|" + quotedUser + ")";
	var userPat=new RegExp("^" + word + "(\\." + word + ")*$");
	var domainPat=new RegExp("^" + atom + "(\\." + atom +")*$");
	var matchArray=emailStr.match(emailPat);
	if (matchArray==null) 
	{
		alert("Email address seems incorrect (check @ and .'s)");
		return false;
	}

	var user=matchArray[1];
	var domain=matchArray[2];
	for (i=0; i<user.length; i++) 
	{
		if (user.charCodeAt(i)>127) 
		{
			alert("Ths username contains invalid characters.");
			return false;
		}
	}
	for (i=0; i<domain.length; i++) 
	{
		if (domain.charCodeAt(i)>127) 
		{
			alert("Ths domain name contains invalid characters.");
			return false;
	   }
	}
	if (user.match(userPat)==null) 
	{
		alert("The username doesn't seem to be valid.");
		return false;
	}
	var IPArray=domain.match(ipDomainPat);
	if (IPArray!=null) 
	{
		for (var i=1;i<=4;i++) 
		{
			if (IPArray[i]>255) 
			{
				alert("Destination IP address is invalid!");
				return false;
			}
		}
		//return true;
	}

	var atomPat=new RegExp("^" + atom + "$");
	var domArr=domain.split(".");
	var len=domArr.length;
	for (i=0;i<len;i++) 
	{
		if (domArr[i].search(atomPat)==-1) 
		{
			alert("The domain name does not seem to be valid.");
			return false;
		}
	}

	/*if (checkTLD && domArr[domArr.length-1].length!=2 && 
	domArr[domArr.length-1].search(knownDomsPat)==-1) 
	{
		alert("The address must end in a well-known domain or two letter " + "country.");
		return false;
	}*/


	if (len<2) 
	{
		alert("This address is missing a hostname!");
		return false;
	}
	return true;
}