function deleteBlanks(entry)
{
	var len = entry.length ;
	var foundBlank = 1;
	while(foundBlank == 1 && len > 0) 
	{
		var indx = entry.indexOf(" ");
		if(indx == -1) 
			foundBlank = 0 ;
		else
			entry = entry.substring(0,indx) + entry.substring(indx+1,len);
		len = entry.length;
	}
	return entry;
}

function isEmpty(val,valName)
{
	if (!deleteBlanks(val.value))
	{
		alert("Please enter the " + valName);
		val.focus();
		return false;	
	}
	return true;
}

function isPassword(val1, valName1, val2, valName2)
{
	if(!isEmpty(val1, valName1))
		return false;

	if(val1.value.length < 6 )
	{
		alert("Please enter atleast 6 characters for " + valName1);
		val1.focus();
		val1.select();
		return false;
	}	
		
	if(!isEmpty(val2, valName2))
		return false;
	
	if(val2.value.length < 6 )
	{
		alert("Please enter atleast 6 characters for " + valName2);
		val2.focus();
		val2.select();
		return false;
	}

	if(val1.value != val2.value)
	{
		alert(valName1 + " and " + valName2 + " should be same");
		val1.focus();
		val1.select();
		return false;
	}
	return true;
}

function isEmail(emailStr)
{
	femailStr= emailStr;
	emailStr = emailStr.value;
/* The following pattern is used to check if the entered e-mail address
   fits the user@domain format.  It also is used to separate the username
   from the domain. */
var emailPat=/^(.+)@(.+)$/
/* The following string represents the pattern for matching all special
   characters.  We don't want to allow special characters in the address. 
   These characters include ( ) < > @ , ; : \ " . [ ]    */
var specialChars="\\(\\)<>@,;:\\\\\\\"\'\.\\[\\]$&#?"
/* The following string represents the range of characters allowed in a 
   username or domainname.  It really states which chars aren't allowed. */
var validChars="\[^\\s" + specialChars + "\]"
/* The following pattern applies if the "user" is a quoted string (in
   which case, there are no rules about which characters are allowed
   and which aren't; anything goes).  E.g. "jiminy cricket"@disney.com
   is a legal e-mail address. */
var quotedUser="(\"[^\"]*\")"
/* The following pattern applies for domains that are IP addresses,
   rather than symbolic names.  E.g. joe@[123.124.233.4] is a legal
   e-mail address. NOTE: The square brackets are required. */
var ipDomainPat=/^\[(\d{1,3})\.(\d{1,3})\.(\d{1,3})\.(\d{1,3})\]$/
/* The following string represents an atom (basically a series of
   non-special characters.) */
var atom=validChars + '+'
/* The following string represents one word in the typical username.
   For example, in john.doe@somewhere.com, john and doe are words.
   Basically, a word is either an atom or quoted string. */
var word="(" + atom + "|" + quotedUser + ")"
// The following pattern describes the structure of the user
var userPat=new RegExp("^" + word + "(\\." + word + ")*$")
/* The following pattern describes the structure of a normal symbolic
   domain, as opposed to ipDomainPat, shown above. */
var domainPat=new RegExp("^" + atom + "(\\." + atom +")*$")


/* Finally, let's start trying to figure out if the supplied address is
   valid. */

/* Begin with the coarse pattern to simply break up user@domain into
   different pieces that are easy to analyze. */
var matchArray=emailStr.match(emailPat)
if (matchArray==null) {
  /* Too many/few @'s or something; basically, this address doesn't
     even fit the general mould of a valid e-mail address. */
	alert("Email address seems incorrect (check @ and .'s)")
	femailStr.focus();
	return false
}
var user=matchArray[1]
var domain=matchArray[2]

// See if "user" is valid 
if (user.match(userPat)==null) {
    // user is not valid
    alert("The email address doesn't seem to be valid.")
	femailStr.focus();
    return false
}

/* if the e-mail address is at an IP address (as opposed to a symbolic
   host name) make sure the IP address is valid. */
var IPArray=domain.match(ipDomainPat)
if (IPArray!=null) {
    // this is an IP address
	  for (var i=1;i<=4;i++) {
	    if (IPArray[i]>255) {
	        alert("Destination IP address is invalid!")
		return false
	    }
    }
    return true
}

// Domain is symbolic name
var domainArray=domain.match(domainPat)
if (domainArray==null) {
	alert("The domain name doesn't seem to be valid.")
	femailStr.focus();
    return false
}

/* domain name seems valid, but now make sure that it ends in a
   three-letter word (like com, edu, gov) or a two-letter word,
   representing country (uk, nl), and that there's a hostname preceding 
   the domain or country. */

/* Now we need to break up the domain to get a count of how many atoms
   it consists of. */
var atomPat=new RegExp(atom,"g")
var domArr=domain.match(atomPat)
var len=domArr.length
if (domArr[domArr.length-1].length<2 || 
    domArr[domArr.length-1].length>3) {
   // the address must end in a two letter or three letter word.
   alert("The address must end in a three-letter domain, or two letter country.")
   return false
}

// Make sure there's a host name preceding the domain.
if (len<2) {
   var errStr="This address is missing a hostname!"
   alert(errStr)
	femailStr.focus();
   return false
}

// If we've gotten this far, everything's valid!
return true;

	/*theString = val.value;
	if (isEmpty(val,"Email"))
	{
		var FirstAtTheRate = theString.indexOf("@");
		var LastAtTheRate = theString.lastIndexOf("@");
		var FirstPeriod = theString.indexOf(".");
		var LastPeriod = theString.lastIndexOf(".");

		if(FirstAtTheRate <= 0 || FirstPeriod <= 0 || LastAtTheRate == theString.length-1 ||	LastPeriod == theString.length-1 || FirstAtTheRate != LastAtTheRate || (LastPeriod - LastAtTheRate)<=1)
		{
			alert("Invalid Email");
			val.focus();
			val.select();
			return false;	
		}
	}
	else
		return false;
	return true;*/
}

function isNumber(val)
{
	count=0;
	str = val.toString();
	for (i=0;i<str.length;i++)
	{
		ch = str.substr(i, 1);
   	    if (ch<"0" || ch>"9")
			return false;
	}
    return true;
}

/* Telephone No. validation */
function checktel(tel,valname)
{
	val1=tel.value;
	if (val1!="")
	{
		for (var i=0;i<val1.length;i++)
		{
			var val = val1.charAt(i);
			if ( (val1.length<12 ) || (i!=7 && i!=3 && (val<"0" || val>"9") ) || ( (i==3 || i==7) && val!="-" ) )
			{
				alert("Please enter the " + valname + " in the format 999-999-9999");
				tel.focus();
				tel.select();
				return false;
			}
		}
	}
	return true;
}

function checkUstel(tel,valname) {
	val1=tel.value;
	if (val1!="")
	{
		for (var i=0;i<val1.length;i++)
		{
			var val = val1.charAt(i);
			if ( (val1.length<12 ) || (i!=7 && i!=3 && (val<"0" || val>"9") ) || ( (i==3 || i==7) && val!="-" ) )
			{
				alert("Please enter the " + valname + " in the format 999-999-9999");
				tel.focus();
				tel.select();
				return false;
			}
		}
	}
	return true;
}
function checkOTUstel(tel,valname) {
	val1=tel.value;
	if (val1!="")
	{
		for (var i=0;i<val1.length;i++)
		{
			var val = val1.charAt(i);
			if ( (val1.length<15) || ( (i==2 || i==6 || i==10) && val!="-" ) )
			{
				alert("Please enter the valid " + valname);
				tel.focus();
				tel.select();
				return false;
			}
		}
	}
	return true;
}
 
 /*Function allowed only to enter numbers
onkeypress="return numbersonly(event, false);"
*/
function numbersonly(e, decimal) {
	var key;
	var keychar;
  
	 if (window.event) {
		key = window.event.keyCode;
	  }
	  else if (e) {
		 key = e.which;
	  }
	  else {
		 return true;
	  }
	  
	  keychar = String.fromCharCode(key);
  
	  if ((key==null) || (key==0) || (key==8) ||  (key==9) || (key==13) || (key==27) ) {
		 return true;
	  }
	  else if ((("0123456789").indexOf(keychar) > -1)) {
		 return true;
	  }
	  else if (decimal && (keychar == ".")) { 
		return true;
	  }
	  else
		 return false;
}
function isProper(string) {

   if (!string) return false;
   var iChars = "1234567890";

   for (var i = 0; i < string.length; i++) {
	  if (iChars.indexOf(string.charAt(i)) != -1)
		 return false;
   }
   return true;
}