Dostum bunu çerezlerle halledebilirsin, çerez için java asp php istediğini kullanabilirsin.
En kolayı java çerezleri araştır, kendi kodlarına da entegre edebilirsin

aşağıda örnek bir çalışma kodu var, ziyaretçiye günde bir defa karşılama mesajı veriyor, bunu kendine göre editleyebilirsin umarım

<script type="text/javascript">
/* This script and many more are available free online at
The JavaScript Source!! http://javascript.internet.com
Created by: Ted Man |  */
function getCookie(c_name) {
		if (document.cookie.length>0) {
			 c_start=document.cookie.indexOf(c_name + "=")
			 if (c_start!=-1) {
    		c_start=c_start + c_name.length+1 
    		c_end=document.cookie.indexOf(";",c_start)
    		if (c_end==-1) c_end=document.cookie.length
    				return unescape(document.cookie.substring(c_start,c_end))
      } 
  		}
		return ""
}
function setCookie(c_name,value,expiredays) {
		var exdate=new Date()
		exdate.setDate(exdate.getDate()+expiredays)
		document.cookie=c_name+ "=" + escape(value) + ((expiredays==null) ? "" : "; expires="+exdate.toGMTString())
}
function checkCookie() {
		var todaysdate = new Date()
		var day = todaysdate.getDay()
		switch (day) {
			 case 1:
					 day = "Monday"
					 break
			 case 2:
					 day = "Tuesday"
					 break
			 case 3:
					 day = "Wednesday"
					 break
			 case 4:
					 day = "Thursday"
					 break
			 case 5:
					 day = "Friday"
					 break
			 case 6:
					 day = "Saturday"
					 break
			 case 0:
					 day = "Sunday"
					 break
		}
  var thedate = getCookie('thedate')
		if (thedate != null && thedate != "") {
			 if (day == thedate) {
			 } else {
				  alert('Be sure to check our daily specials!')
			 }
		} else {
 			thedate = day
 			if (thedate!=null && thedate!="") {
    		setCookie('thedate', thedate, 365)
    		alert('Be sure to check our daily specials!')
    }
  }
}
// Multiple onload function created by: Simon Willison
// http://simonwillison.net/2004/May/26/addLoadEvent/
function addLoadEvent(func) {
  var oldonload = window.onload;
  if (typeof window.onload != 'function') {
    window.onload = func;
  } else {
    window.onload = function() {
      if (oldonload) {
        oldonload();
      }
      func();
    }
  }
}
addLoadEvent(function() {
  checkCookie();
});
</script>