function validate_required(field,alerttxt,initialVal)
{
with (field)
{

if(value==null||value==""||value==initialVal)
  {alert(alerttxt);return false}

else {return true}
}
}


function valForm(thisform)
{ with (thisform){
	if (validate_required(fname,"First Name is required field!")==false)
	  {fname.focus();return false}
	if (validate_required(mi,"Middle Name is required field!")==false)
	  {mi.focus();return false} 
	if (validate_required(lname,"Last Name is required field!")==false)
	  {lname.focus();return false} 
	if (validate_email(email,"Not a valid e-mail address")==false)
	  {email.focus();return false}	
	}
}


function validate_email(field,alerttxt,initialVal)
{
with (field)
{
apos=value.indexOf("@")
dotpos=value.lastIndexOf(".")
if (apos<1||dotpos-apos<2) 
  {alert(alerttxt);return false}
else if (value==initialVal) 
  {alert(alerttxt);return false}
else {return true}
}
}

// Declaring required variables
var digits = "0123456789";
// non-digit characters which are allowed in phone numbers
var phoneNumberDelimiters = "()- ";
// characters which are allowed in international phone numbers
// (a leading + is OK)
var validWorldPhoneChars = phoneNumberDelimiters + "+";
// Minimum no of digits in an international phone no.
var minDigitsInIPhoneNumber = 10;

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++)
    {   
        // Check that current character isn't whitespace.
        var c = s.charAt(i);
        if (bag.indexOf(c) == -1) returnString += c;
    }
    return returnString;
}

function checkInternationalPhone(strPhone){
s=stripCharsInBag(strPhone,validWorldPhoneChars);
return (isInteger(s) && s.length >= minDigitsInIPhoneNumber);
}


function numbersonly(e){
var unicode=e.charCode? e.charCode : e.keyCode
if (unicode!=8){ //if the key isn't the backspace key (which we should allow)
if (unicode<48||unicode>57) //if not a number
return false //disable key press
}
}