function Emailval(txtEmail,_Mail)
{     
    var _email = document.getElementById(txtEmail).value;
    var _indexat= _email.indexOf("@");
    var _indexdot= _email.lastIndexOf(".");
    var _domain= _indexdot - _indexat;
    if (_indexat==-1 || _indexdot ==-1 || _domain < 3) 
    {
        alert("Enter valid E-Mail address!");
        return false;
    }   
    var _index = new Array();
    var _mailExtenstion = _Mail.split(",");   
    var _lExt = _email.substring(_email.lastIndexOf('.'),_email.length);       
    for(var i=0;i<=_mailExtenstion.length;i++)
    {       
        var _CheckExtenstion=_mailExtenstion[i];
        var flg = false;
        if(_lExt == _CheckExtenstion)
        {
            flg = true ;
            break;
        }
        else
        {
            flg = false ;
        }
         
   }
        
        if(flg == false )
        {
            alert("Wrong E-mail Extenstion Continue");
            return false;
        }
        return true;
    }