function echeckjs(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
//   }

   
   var reg = /^([A-Za-z0-9_\-\.])+\@([A-Za-z0-9_\-\.])+\.([A-Za-z]{2,4})$/;
   //var address = document.forms[form_id].elements[email].value;
   if(reg.test(str) == false) {
      alert('Invalid email address.');
      return false;
                            }
 }
function submitenter(kk,e)
{  
var keycode;
if(window.event){ keycode = window.event.keyCode; }

else if(e){ keycode = e.which; }

if(keycode == 13){ 
   if(kk=='') {alert('Please insert your email ID.'); document.getElementById('email_nws').focus(); return false;}else{
if (echeckjs(kk)==false){
	  //email_nws.value=""
	  document.getElementById('email_nws').value="";
	  document.getElementById('email_nws').focus();
	  return false
	                  }
	 else
	{	
	window.location = "news_letter.php?usr_id="+kk;
		}
                                                                                           }
                  }

}


function submitsubscribe()
{ kk= document.getElementById('email_nws').value;
  if(kk=='') {alert('Please insert your E-mail ID.'); document.getElementById('email_nws').focus(); return false;} else{
if (echeckjs(kk)==false){
	  //email_nws.value=""
	  document.getElementById('email_nws').value="";
	  document.getElementById('email_nws').focus();
	  return false;
	                  }
	 else
	   {	
	window.location = "news_letter.php?usr_id="+kk;
		}
  }
}


var phoneNumberDelimiters = "()- ";

var validWorldPhoneChars = phoneNumberDelimiters + "+";

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);
}