// 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 trim(s)
{   var i;
    var returnString = "";
    // Search through string's characters one by one.
    // If character is not a whitespace, append to returnString.
    for (i = 0; i < s.length; i++)
	{   
	    // Check that current character isn't whitespace.
	    var c = s.charAt(i);
	    if (c != " ") returnString += c;
	}
    return returnString;
}
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){
var bracket=3
    strPhone=trim(strPhone)
    if(strPhone.indexOf("+")>1) return false
				    if(strPhone.indexOf("-")!=-1)bracket=bracket+1
								     if(strPhone.indexOf("(")!=-1 && strPhone.indexOf("(")>bracket)return false
																       var brchr=strPhone.indexOf("(")
																       if(strPhone.indexOf("(")!=-1 && strPhone.charAt(brchr+2)!=")")return false
																									 if(strPhone.indexOf("(")==-1 && strPhone.indexOf(")")!=-1)return false
																																       s=stripCharsInBag(strPhone,validWorldPhoneChars);
return (isInteger(s) && s.length >= minDigitsInIPhoneNumber);
}

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
	}

function ValidateForm(){
    var Contact0FirstName=document.frmSample.Contact0FirstName
	var emailID=document.frmSample.Contact0Email
	//var Phone=document.frmSample.Contact0Phone1
	
	if ((Contact0FirstName.value==null)||(Contact0FirstName.value=="")){
	    alert("Please Enter your Full Name")
	    Contact0FirstName.focus()
	    return false
	}

    if ((emailID.value==null)||(emailID.value=="")){
	alert("Please Enter your Email ID")
	    emailID.focus()
	    return false
	    }
    if (echeck(emailID.value)==false){
	emailID.value=""
	    emailID.focus()
	    return false
	    }

    /*
      if ((Phone.value==null)||(Phone.value=="")){
      alert("Please Enter your Phone Number")
      Phone.focus()
      return false
      }
      if (checkInternationalPhone(Phone.value)==false){
      alert("Please Enter a Valid Phone Number")
      Phone.value=""
      Phone.focus()
      return false
      }
    */

    return true
	
	}