//Number Formating and number validation added by john 08-March-2010
function ValidateNumberKeyPress(field,evt){
	//var charCode = (evt.which) ? evt.which : event.keyCode
if(window.event) {evt=event;}
var charCode = evt.which;
var keychar = String.fromCharCode(charCode);
if (charCode > 31 && (charCode < 48 || charCode > 57) && keychar != "." && keychar != "-" ){
return false;
}
if (keychar == "." && field.value.indexOf(".") != -1) {
return false;
}
if(keychar == "-"){
if (field.value.indexOf("-") != -1 /* || field.value[0] == "-" */){
return false;
}else{
//save caret position
var caretPos = getCaretPosition(field);
if(caretPos != 0){
return false;
}
}
}
return true;
}
function ValidateNumberKeyUp(field){
if(document.selection.type == "Text"){
return;
}
//save caret position
var caretPos = getCaretPosition(field);

var fdlen = field.value.length;

UnFormatNumber(field);

var IsFound = /^-?\d+\.{0,1}\d*$/.test(field.value);
if(!IsFound){

setSelectionRange(field, caretPos, caretPos);

return false;
}

field.value = FormatNumber(field.value);

fdlen = field.value.length - fdlen;

setSelectionRange(field, caretPos+fdlen, caretPos+fdlen);
}

function ValidateAndFormatNumber(NumberTextBox){
if(NumberTextBox.value == "") return;
UnFormatNumber(NumberTextBox);
var IsFound = /^-?\d+\.{0,1}\d*$/.test(NumberTextBox.value);
if(!IsFound){
//alert("Not a number");
NumberTextBox.value='';
NumberTextBox.focus();
NumberTextBox.select();
return;
}

if(isNaN(parseFloat(NumberTextBox.value))){
alert("Number exceeding float range");
NumberTextBox.focus();
NumberTextBox.select();
}
NumberTextBox.value = FormatNumber(NumberTextBox.value);
}

function FormatNumber(fnum){
var orgfnum = fnum;
var flagneg = false;
if(fnum.charAt(0) == "-"){
flagneg = true;
fnum = fnum.substr(1, fnum.length-1);
}
psplit = fnum.split(".");
var cnum = psplit[0],
parr = [],
j = cnum.length,
m = Math.floor(j / 3),
n = cnum.length % 3 || 3;

// break the number into chunks of 3 digits; first chunk may be less than 3
for (var i = 0; i < j; i += n) {
if (i != 0) {n = 3;}
parr[parr.length] = cnum.substr(i, n);
m -= 1;
}

// put chunks back together, separated by comma
fnum = parr.join(",");

// add the precision back in
//if (psplit[1]) {fnum += "." + psplit[1];}
if (orgfnum.indexOf(".") != -1) {
fnum += "." + psplit[1];
}

if(flagneg == true){
fnum = "-" + fnum;
}
return fnum;
}

function UnFormatNumber(obj){
if(obj.value == "") return;
obj.value = obj.value.replace(/,/gi, "");
}

function getCaretPosition(objTextBox){
var objTextBox = window.event.srcElement;
var i = objTextBox.value.length;
if (objTextBox.createTextRange){
objCaret = document.selection.createRange().duplicate();
while (objCaret.parentElement()==objTextBox &&
objCaret.move("character",1)==1) --i;
}
return i;
}

function setSelectionRange(input, selectionStart, selectionEnd) {
if (input.setSelectionRange) {
input.focus();

input.setSelectionRange(selectionStart, selectionEnd);
}else if (input.createTextRange) {
var range = input.createTextRange();
range.collapse(true);
range.moveEnd('character', selectionEnd);
range.moveStart('character', selectionStart);
range.select();
}
}
//onkeypress="return ValidateNumberKeyPress(this, event);" 
//onkeyup="ValidateNumberKeyUp(this);"
//onblur="ValidateAndFormatNumber(this);"
//till here