var objDEST_Msg;
function lableeraseHead()
{
    objDEST_Msg = eval("document.getElementById('ctl00_Header1_lblMessage')");
    objDEST_Msg.innerHTML=""; 
}
var objOfLabel;

function ResetHead()
{
    var Email=eval("document.getElementById('ctl00_Header1_txtEmail')");
    var Message=eval("document.getElementById('ctl00_Header1_lblPopMessage')");
    Email.value="";
    Message.innerHTML="";
    return false;
}

function CheckEmailAddressHead()
{
 if(document.getElementById("ctl00_Header1_txtEmail").value=="")
 {
   objOfLabel=eval("document.getElementById('ctl00_Header1_lblPopMessage')");
  objOfLabel.innerHTML = "Email Address Not Allowed To Be Blank!";  
 return false;
 }
 if(!ChkEmailHeader(document.getElementById("ctl00_Header1_txtEmail").value))
 {
  return false;
 }
 } 
 
function ChkEmailHeader(mail)
{
  var str=mail;
      objOfLabel=eval("document.getElementById('ctl00_Header1_lblPopMessage')");
 
  if (!str=="")
  {
   if (str.indexOf("@",1) == -1)
   {
     objOfLabel.innerHTML = "That is not a valid Email address. Please enter again.";  
    return false;
   }
   if (str.indexOf("@",1)== 0)
   {
        objOfLabel.innerHTML = "That is not a valid Email address. Please enter again.";  
    return false;
   }
   if (str.indexOf(".")== 0)
   {
        objOfLabel.innerHTML = "That is not a valid Email address. Please enter again.";  
    return false;
   }
   if (str.indexOf(".",1) == -1)
   {
        objOfLabel.innerHTML = "That is not a valid Email address. Please enter again.";  
    return false;
   }
  
   // extra validation
   var posat=str.indexOf("@");
   var posdot=str.indexOf(".");
   var rposdot=str.lastIndexOf(".");
   if(rposdot==posdot)
   if((posdot < posat) || (posdot-posat < 3))
   {
        objOfLabel.innerHTML = "That is not a valid Email address. Please enter again.";  
    return false;
   }
   if(str.charAt(str.length-1)==".")
   {
        objOfLabel.innerHTML = "That is not a valid Email address. Please enter again.";  
    return false;
   }
   if(str.charAt(str.length-1)=="@")
   {
        objOfLabel.innerHTML = "That is not a valid Email address. Please enter again.";  
    return false;
   }
   var j=0;
   for( var i=0;i<str.length;i++)
   {
    if(str.charAt(i) == "@")
    j++;
   }
   if(j > 1)
   {
        objOfLabel.innerHTML = "That is not a valid Email address. Please enter again.";  
       return false;
   }
  }
  return true;
}

var objOfValidation;

function UserNamePasswordValidation()
{  
    objOfValidation=eval("document.getElementById('ctl00_Header1_lblMessage')");
    objOfValidation.innerHTML=""; 
    if(document.getElementById("ctl00_Header1_txtUserName").value=="")
    {
        if(document.getElementById("ctl00_Header1_txtPassword").value=="")
        {
           objOfValidation.innerHTML = "* Please enter username and password !";  
           return false;
        }
        else
        {
           objOfValidation.innerHTML = "* Please enter username !";  
           return false;
        }
    }
    else
    {
        if(document.getElementById("ctl00_Header1_txtPassword").value=="")
        {
           objOfValidation.innerHTML = "* Please enter password !";  
           return false;
        }
    }
    return true;
}