//  This script is based on the javascript code of Roman Feldblum (web.developer@programmer.net) 
//  Original script : http://javascript.internet.com/forms/format-phone-number.html 
//  Original script is revised by Eralper Yilmaz (http://www.eralper.com) 
//  Revised script : http://www.kodyaz.com 

var zChar = new Array(' ', '(', ')', '-', '.');
var maxphonelength = 13;
var phonevalue1;
var phonevalue2;
var cursorposition;

function ParseForNumber1(object){
	phonevalue1 = ParseChar(object.value, zChar);
}
function ParseForNumber2(object){
	phonevalue2 = ParseChar(object.value, zChar);
}

function backspacerUP(object,e) { 
	if(e){ 
		e = e;
	} else {
		e = window.event; 
	} 
	if(e.which){ 
		var keycode = e.which; 
	} else {
		var keycode = e.keyCode;
	}

	ParseForNumber1(object);

	if(keycode >= 48){
		ValidatePhone(object);
	}
}

function backspacerDOWN(object,e) { 
	if(e){ 
		e = e; 
	} else {
		e = window.event; 
	} 
	if(e.which){ 
		var keycode = e.which; 
	} else {
		var keycode = e.keyCode; 
	}
	ParseForNumber2(object);
} 

function GetCursorPosition(){
	var t1 = phonevalue1;
	var t2 = phonevalue2;
	var bool = false;
	for (i=0; i<t1.length; i++) {
		if (t1.substring(i,1) != t2.substring(i,1)) {
			if(!bool) {
				cursorposition=i;
				bool=true;
			}
		}
	}
}

function ValidatePhone(object){

	var p = phonevalue1;

	p = p.replace(/[^\d]*/gi,"");

	if (p.length < 3) {
		object.value=p;
	}
	else if(p.length==3){
		pp=p;
		d4=p.indexOf('(');
		d5=p.indexOf(')');
		if(d4==-1){
			pp="("+pp;
		}
		if(d5==-1){
			pp=pp+")";
		}
		object.value = pp;
	}
//	else if(p.length>3 && p.length < 7){
	else if(p.length>3 && p.length < 6){
		p ="(" + p; 
		l30=p.length;
		p30=p.substring(0,4);
		p30=p30+")";

		p31=p.substring(4,l30);
		pp=p30+p31;

		object.value = pp; 
	} 
	else if(p.length >= 6){
		p ="(" + p; 
		l30=p.length;
		p30=p.substring(0,4);
		p30=p30+")";

		p31=p.substring(4,l30);
		pp=p30+p31;

		l40 = pp.length;
		p40 = pp.substring(0,8);
		p40 = p40 + "-";

		p41 = pp.substring(8,l40);
		ppp = p40 + p41;

		object.value = ppp.substring(0, maxphonelength);
	}

	GetCursorPosition(); 

	if(cursorposition >= 0){
		if (cursorposition == 0) {
			cursorposition = 2;
		} else if (cursorposition <= 2) {
			cursorposition = cursorposition + 1;
		} else if (cursorposition <= 5) {
			cursorposition = cursorposition + 2;
		} else if (cursorposition == 6) {
			cursorposition = cursorposition + 2;
		} else if (cursorposition == 7) {
			cursorposition = cursorposition + 4;
			e1=object.value.indexOf(')');
			e2=object.value.indexOf('-');
			if (e1>-1 && e2>-1){
				if (e2-e1 == 4) {
					cursorposition = cursorposition - 1;
				}
			}
		} else if (cursorposition < 11) {
			cursorposition = cursorposition + 3;
		} else if (cursorposition == 11) {
			cursorposition = cursorposition + 1;
		} else if (cursorposition >= 12) {
			cursorposition = cursorposition;
		}

		var txtRange = object.createTextRange();
		txtRange.moveStart( "character", cursorposition);
		txtRange.moveEnd( "character", cursorposition - object.value.length);
		txtRange.select();
	}
}

function ParseChar(sStr, sChar) {
	if (sChar.length == null) 	{
		zChar = new Array(sChar);
	}
	else zChar = sChar;

	for (i=0; i<zChar.length; i++)	{
		sNewStr = "";

		var iStart = 0;
		var iEnd = sStr.indexOf(sChar[i]);

		while (iEnd != -1) {
			sNewStr += sStr.substring(iStart, iEnd);
			iStart = iEnd + 1;
			iEnd = sStr.indexOf(sChar[i], iStart);
		}

		sNewStr += sStr.substring(sStr.lastIndexOf(sChar[i]) + 1, sStr.length);

		sStr = sNewStr;
	}

	return sNewStr;
}