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javascript get cookie

Posted on 2010-08-13
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Last Modified: 2012-05-10
First, how do I retrieve a cookie in javascript, then how do I display the alt text with the image?
In vbscript the cookie would be 'request.cookie("webuser")("company")', and tried js code I found but not working.

<%
sCo = request.cookies("webuser")("Company")
       SQL = "SELECT * FROM T1Imgs where dblvl ='"+sCO+"' order by dbsec4,id"
       SQL_Rs.open SQL,SQL_Cn,3
       	IF NOT(SQL_Rs.EOF) THEN
	  arrResults = SQL_Rs.getrows
	END IF
      	SQL_Rs.close
      	
%>
<script language="JavaScript">
adImages=new Array(
'<%=arrResults(4,0)%>',
'<%=arrResults(4,1)%>',
'<%=arrResults(4,2)%>',
'<%=arrResults(4,3)%>');
adURL=new Array(
'<%=arrResults(4,0)%>',
'<%=arrResults(4,1)%>',
'<%=arrResults(4,2)%>',
'<%=arrResults(4,3)%>');
adALT=new Array(
'<%=arrResults(1,0)%>',
'<%=arrResults(1,1)%>',
'<%=arrResults(1,2)%>',
'<%=arrResults(1,3)%>');

thisAd = 0
imgCt = adImages.length

function rotate() {
 var theCookie=""+document.cookie;   // this is the js code I found to get the cookie, but didn't work
 var ind=theCookie.indexOf(Company);
 if (ind==-1 || theCookie=="") return ""; 
 var ind1=theCookie.indexOf(';',ind);
 if (ind1==-1) ind1=theCookie.length; 
 var sCo = theCookie.substring(ind+cookieName.length+1,ind1));
 

 if (document.images) {
    if (document.cycle.complete) {
	  thisAd++
	  if (thisAd == imgCt) {
	    thisAd = 0
	  }
	  document.cycle.src = "emenus/"+sCo+"/"+adImages[thisAd]; // + adALT[thisAd];" doesn't work
	  document.cycle.alt = "alt="+adALT[thisAd];
	}
	setTimeout("rotate()", 5000)   // 5 seconds
  }
}
function rotateLink() { window.open(adURL[thisAd]) }
</script>
<table>
    <tbody>
        <tr>
            <td valign="top" width="10" align="left">&nbsp;</td>
            <td height="520" valign="top" align="left"><strong><br />
            <a onClick="rotateLink()" href="javascript:void(0)">
            <img border="0" name="cycle"  src="/emenus/"+"<%=sCo%>"+"/"+"<%=arrResults(4,0)%>" /> </a><br />
            <br />
            <%=arrResults(1,0)%></strong></td>
        </tr>
    </tbody>
</table>

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Question by:dcass
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8 Comments
 

Expert Comment

by:oshirowanen
ID: 33428529
Can I recommend you use jQuery instead of raw javascript.  It will make your life a whole lot easier.

Here is an example of getting, setting and everything else you can do with a cookie using jQuery.  Just view source the page to see the code.

http://stilbuero.de/jquery/cookie/

I hope this helps.
0
 
LVL 75

Expert Comment

by:Michel Plungjan
ID: 33428533
Here.
Drop it in as
<script src="cookie.js" type="text/javascript"></script>

then use getCookie('nameOfCookie')

and
setCookie('nameOfCookie','CookieContent',expiryDate);
or
setCookie('nameOfCookie',varContaininCookieContent,expiryDate);


// cookie.js file
var cookieToday = new Date(); 
var expiryDate = new Date(cookieToday.getTime() + (365 * 86400000)); // a year

/* Cookie functions originally by Bill Dortsch */

function setCookie (name,value,expires,path,theDomain,secure) { 
   value = escape(value);
   var theCookie = name + "=" + value + 
   ((expires)    ? "; expires=" + expires.toGMTString() : "") + 
   ((path)       ? "; path="    + path   : "") + 
   ((theDomain)  ? "; domain="  + theDomain : "") + 
   ((secure)     ? "; secure"            : ""); 
   document.cookie = theCookie;
} 

function getCookie(Name) { 
   var search = Name + "=" 
   if (document.cookie.length > 0) { // if there are any cookies 
      var offset = document.cookie.indexOf(search) 
      if (offset != -1) { // if cookie exists 
         offset += search.length 
         // set index of beginning of value 
         var end = document.cookie.indexOf(";", offset) 
         // set index of end of cookie value 
         if (end == -1) end = document.cookie.length 
         return unescape(document.cookie.substring(offset, end)) 
      } 
   } 
} 
function delCookie(name,path,domain) {
   if (getCookie(name)) document.cookie = name + "=" +
      ((path)   ? ";path="   + path   : "") +
      ((domain) ? ";domain=" + domain : "") +
      ";expires=Thu, 01-Jan-70 00:00:01 GMT";
}

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LVL 40

Expert Comment

by:Gurvinder Pal Singh
ID: 33428564
this link has source with examples
http://www.w3schools.com/js/js_cookies.asp
you can try out also
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LVL 75

Expert Comment

by:Michel Plungjan
ID: 33428578
Here is an untested version with some cleanup

<%
sCo = request.cookies("webuser")("Company")
       SQL = "SELECT * FROM T1Imgs where dblvl ='"+sCO+"' order by dbsec4,id"
       SQL_Rs.open SQL,SQL_Cn,3
       	IF NOT(SQL_Rs.EOF) THEN
	  arrResults = SQL_Rs.getrows
	END IF
      	SQL_Rs.close
      	
%>
<script type="text/javascript" language="JavaScript" src="cookie.js"></script>
<script type="text/javascript" language="JavaScript">
adImages=new Array(
'<%=arrResults(4,0)%>',
'<%=arrResults(4,1)%>',
'<%=arrResults(4,2)%>',
'<%=arrResults(4,3)%>');
adURL=new Array(
'<%=arrResults(4,0)%>',
'<%=arrResults(4,1)%>',
'<%=arrResults(4,2)%>',
'<%=arrResults(4,3)%>');
adALT=new Array(
'<%=arrResults(1,0)%>',
'<%=arrResults(1,1)%>',
'<%=arrResults(1,2)%>',
'<%=arrResults(1,3)%>');

var thisAd = 0
var imgCt = adImages.length;

function rotate() {
 if (!document.images) return ""; // not really needed since IE3.2 is such a long time ago ;)

 var sCo=getCookie('Company');
 if (sCo=="") return ""; 
 if (document.cycle.complete) {
	  thisAd++;
	  if (thisAd == imgCt) {
	    thisAd = 0;
	  }
	  document.cycle.src = "emenus/"+sCo+"/"+adImages[thisAd]; 
	  document.cycle.alt = adALT[thisAd];
	}
}
function rotateLink() { window.open(adURL[thisAd]) }

var tId = "";
window.onload=function() {
  tId = setInterval('rotate()',5000);
}
</script>
<table>
    <tbody>
        <tr>
            <td valign="top" width="10" align="left">&nbsp;</td>
            <td height="520" valign="top" align="left"><strong><br />
            <a onClick="rotateLink()" href="javascript:void(0)">
            <img border="0" name="cycle"  src="/emenus/"+"<%=sCo%>"+"/"+"<%=arrResults(4,0)%>" /> </a><br />
            <br />
            <%=arrResults(1,0)%></strong></td>
        </tr>
    </tbody>
</table>

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LVL 75

Accepted Solution

by:
Michel Plungjan earned 2000 total points
ID: 33428594
Actually, why use cookies???

Is something setting this cookie somewhere between rotations?

If not:

<%
sCo = request.cookies("webuser")("Company")
       SQL = "SELECT * FROM T1Imgs where dblvl ='"+sCO+"' order by dbsec4,id"
       SQL_Rs.open SQL,SQL_Cn,3
       	IF NOT(SQL_Rs.EOF) THEN
	  arrResults = SQL_Rs.getrows
	END IF
      	SQL_Rs.close
      	
%>
<script type="text/javascript" language="JavaScript">
adImages=new Array(
'<%=arrResults(4,0)%>',
'<%=arrResults(4,1)%>',
'<%=arrResults(4,2)%>',
'<%=arrResults(4,3)%>');
adURL=new Array(
'<%=arrResults(4,0)%>',
'<%=arrResults(4,1)%>',
'<%=arrResults(4,2)%>',
'<%=arrResults(4,3)%>');
adALT=new Array(
'<%=arrResults(1,0)%>',
'<%=arrResults(1,1)%>',
'<%=arrResults(1,2)%>',
'<%=arrResults(1,3)%>');

var thisAd = 0
var imgCt = adImages.length;
var sCo = '<%= sCo %>';
function rotate() { // using onload instead of complete
  thisAd++;
  if (thisAd == imgCt) thisAd = 0;
  document.cycle.src = "emenus/"+sCo+"/"+adImages[thisAd]; 
  document.cycle.alt = adALT[thisAd];
}
function rotateLink() { window.open(adURL[thisAd]) }

var tId = "";
window.onload=function() {
  tId = setInterval('rotate()',5000);
}
</script>
<table>
    <tbody>
        <tr>
            <td valign="top" width="10" align="left">&nbsp;</td>
            <td height="520" valign="top" align="left"><strong><br />
            <a onClick="rotateLink()" href="javascript:void(0)">
            <img border="0" name="cycle"  src="/emenus/"+"<%=sCo%>"+"/"+"<%=arrResults(4,0)%>" /> </a><br />
            <br />
            <%=arrResults(1,0)%></strong></td>
        </tr>
    </tbody>
</table>

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LVL 75

Expert Comment

by:Michel Plungjan
ID: 33428633
And even better : - popup blocker protection

<%
sCo = request.cookies("webuser")("Company")
       SQL = "SELECT * FROM T1Imgs where dblvl ='"+sCO+"' order by dbsec4,id"
       SQL_Rs.open SQL,SQL_Cn,3
       	IF NOT(SQL_Rs.EOF) THEN
	  arrResults = SQL_Rs.getrows
	END IF
      	SQL_Rs.close
      	
%>
<script type="text/javascript" language="JavaScript">
adImages=new Array(
'<%=arrResults(4,0)%>',
'<%=arrResults(4,1)%>',
'<%=arrResults(4,2)%>',
'<%=arrResults(4,3)%>');
adURL=new Array(
'<%=arrResults(4,0)%>',
'<%=arrResults(4,1)%>',
'<%=arrResults(4,2)%>',
'<%=arrResults(4,3)%>');
adALT=new Array(
'<%=arrResults(1,0)%>',
'<%=arrResults(1,1)%>',
'<%=arrResults(1,2)%>',
'<%=arrResults(1,3)%>');

var thisAd = 0
var imgCt = adImages.length;
var sCo = '<%= sCo %>';
function rotate() { // using onload instead of complete
  thisAd++;
  if (thisAd == imgCt) thisAd = 0;
  document.cycle.src = "emenus/"+sCo+"/"+adImages[thisAd]; 
  document.cycle.alt = adALT[thisAd];
}
function rotateLink(link) { 
  var w = window.open(adURL[thisAd],link.target);
  if (w) return false;
  link.href=adURL[thisAd];
  return true; // default link behaviour
}

var tId = "";
window.onload=function() {
  tId = setInterval('rotate()',5000);
}
</script>
<table>
    <tbody>
        <tr>
            <td valign="top" width="10" align="left">&nbsp;</td>
            <td height="520" valign="top" align="left"><strong><br />
            <a onClick="return rotateLink(this)" target="_blank" href="<%=arrResults(4,0)%>"><img 
              border="0" name="cycle"  src="/emenus/"+"<%=sCo%>"+"/"+"<%=arrResults(4,0)%>" /></a><br />
            <br />
            <%=arrResults(1,0)%></strong></td>
        </tr>
    </tbody>
</table>

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Author Comment

by:dcass
ID: 33438081
Got the variable into jscript - thanks 33428633, but need a way to display the "alt" text on the page under the image as a description, making a rotating description match the rotation image.
0
 
LVL 75

Expert Comment

by:Michel Plungjan
ID: 33438372
<br /><span id="altText"><%=arrResults(1,0)%></span></strong></td>


and

function rotate() { // using onload instead of complete
  thisAd++;
  if (thisAd == imgCt) thisAd = 0;
  document.cycle.src = "emenus/"+sCo+"/"+adImages[thisAd];
  document.cycle.alt = adALT[thisAd];
document.getElementById('alttext').innerHMTL=adALT[thisAd]
}

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