http = getHTTPObject();

function invitefriend(documentid)
{        
    var Code = "";  
    var email_v_check="";
    Code=document.getElementById('invitemailid').value;       
    email_v_check=checkEmail(Code);
    if(email_v_check!="")
    {
        alert(email_v_check);
        return false;
    } else {
    var cnmsg="Are you sure you want to  Invite Friend "; 
    if (confirm(cnmsg)) 
    {
    vUrl='kmeda_ajax/invitefriend.php?email='+Code;
    //alert(vUrl);
    var isWorking = false;
        if(!isWorking)
        {
            http.open("POST", vUrl , true);
            isWorking = true;
            http.onreadystatechange = handleresponse_invitefriend;
            http.send(null);
        }   
    
    }
    else
    {
    return false;
    }
    
    
    }
    
}
function handleresponse_invitefriend()
{                         
    if(http.readyState== 4)
    {
        isWorking = false;
        var invitefriend="";
        invitefriend= http.responseText;
      // alert(invitefriend);
        if(invitefriend=='SUCCESS')
        {
          document.getElementById('Invite_message_stat').innerHTML ="<font color='maroon'>Invitation sent</font>";
    	  document.getElementById('invitemailid').value="";	    
	}
  }
}