// JavaScript Document
//Email validation ----- START --------
function echeck(str) {

		var at="@"
		var dot="."
		var lat=str.indexOf(at)
		var lstr=str.length
		var ldot=str.indexOf(dot)
		if (str.indexOf(at)==-1){
		   alert("Invalid E-mail ID")
		   return false
		}

		if (str.indexOf(at)==-1 || str.indexOf(at)==0 || str.indexOf(at)==lstr){
		   alert("Invalid E-mail ID")
		   return false
		}

		if (str.indexOf(dot)==-1 || str.indexOf(dot)==0 || str.indexOf(dot)==lstr){
		    alert("Invalid E-mail ID")
		    return false
		}

		 if (str.indexOf(at,(lat+1))!=-1){
		    alert("Invalid E-mail ID")
		    return false
		 }

		 if (str.substring(lat-1,lat)==dot || str.substring(lat+1,lat+2)==dot){
		    alert("Invalid E-mail ID")
		    return false
		 }

		 if (str.indexOf(dot,(lat+2))==-1){
		    alert("Invalid E-mail ID")
		    return false
		 }
		
		 if (str.indexOf(" ")!=-1){
		    alert("Invalid E-mail ID")
		    return false
		 }

 		 return true					
	}
	//Email validation ----- END --------
//phone number validation
var digits = "0123456789";
var phoneNumberDelimiters = "()- ";
var validWorldPhoneChars = phoneNumberDelimiters + "+";
var minDigitsInIPhoneNumber = 8;

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);
}
//String checking..............................
function checkString(values)
{
	var my_string=values
	if(isNaN(my_string)==true)
	{
		return true
	}
	return false
}
//number checkiing
function checkNumber(valueN)
{
	var my_string=valueN
	if(isNaN(my_string)==false)
	{
		return true
	}
	return false
}
function ValidateForm()
{
	var appName=document.form1.txtFname
	var appph=document.form1.txtCph
	var appEmail=document.form1.txtEmail
	
	if((appName.value==null)||(appName.value==""))
	{
		alert("Please Enter First Name")
		appName.focus()
		return false
	}
	if(checkString(appName.value)==false)
	{
		appName.value=""
		appName.focus()
		return false
	}
	if((appEmail.value==null)||(appEmail.value==""))
	{
		alert("Please Enter Your Email Address")
		appEmail.focus()
		return false	
	}
	if (echeck(appEmail.value)==false){
		appEmail.value=""
		appEmail.focus()
		return false
	}
	if((appph.value==null)||(appph.value==""))
	{
		alert("Please Enter Your Cell Phone No")
		appph.focus()
		return false	
	}
	if (checkInternationalPhone(appph.value)==false){
		alert("Please Enter Valid Cell Phone No")
		appph.value=""
		appph.focus()
		return false
	}
	
	return true
}