How To Do A JavaScript Pop-Up Welcome Message

Can you help me here? I want to show a message every time somebody visits my website! However I want this message to popup only on home page.

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To show a message when loading page add this JavaScript before </head>

Code:

<script type="text/javascript">
alert("Your Welcome Message Goes Here");
</script>

If you want to show a message before leaving the page:

Code:

<script type="text/javascript">
  window.onbeforeunload = confirmExit;
  function confirmExit()
  {
    return "Your Message Goes Here";
  }
</script>

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You may have to consider using cookie to only show welcome message once and not pop-up the window every time user loads that page!

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You can try using this JavaScript popup message alert that will only show once per browser session! Just add it to your header above </head> tag

PHP Code:

<script>
var alertmessage="Alert Popup message goes here"
var once_per_session=1
function get_cookie(Name) {
  var search = Name + "="
  var returnvalue = "";
  if (document.cookie.length > 0) {
    offset = document.cookie.indexOf(search)
    if (offset != -1) {
      offset += search.length
      end = document.cookie.indexOf(";", offset);
      if (end == -1)
         end = document.cookie.length;
      returnvalue=unescape(document.cookie.substring(offset, end))
      }
   }
  return returnvalue;
}

function alertornot(){
if (get_cookie('alerted')==''){
loadalert()
document.cookie="alerted=yes"
}
}

function loadalert(){
alert(alertmessage)
}

if (once_per_session==0)
loadalert()
else
alertornot()
</script> 


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Thanks Marcus. Yeah you need to set a cookie to prevent popup alert showing every time you visit the web page. My JavaScript is pretty basic popup welcome message. I think instead of once per session you can set cookie to expire in 24 hours!

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It's better to use "jQuery modal popup" as jQuery gives you more control. Or you can simply use HTML5 with a bit of CSS3 to create cool popup form.

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