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Views: 1211 | Replies: 3

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Join Date: May 2008

Posts: 14

Reputation: luxmi_gee is an unknown quantity at this point

Rep Power: 1

Solved Threads: 0

luxmi_gee

Offline

Newbie Poster

refresh

May 26th, 2008

hi

i want refresh the jsp page every seconds using AJAX in script.

any one have a code for that.

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Join Date: Aug 2006

Location: Noida, India

Posts: 158

Reputation: Luckychap is an unknown quantity at this point

Rep Power: 3

Solved Threads: 17

Luckychap

Offline

Junior Poster

Re: refresh

May 26th, 2008

First I want to tell u if u want the whole page to refresh, then there is no need to use ajax. U just have to write a function which will load ur page every pireod of time..

Ajax is used to update small portion of the page in background without waiting for hole page to get refresh. You can use ajax to make ur page user-intractive, by peforming some small task in the backgound while the user is free to intract with the page.

Best example is: there is web page to display weather reports of various cities, and if user selects a city, the weather details corresponding to that city should be loaded in a div.
And here is where the real power of ajax comes. You can creata function which send an ajax request and get the weather details from server back to client, and according to data u can update the div with new value (Temp, images etc.) without refreshing the whole page. And what more, a second request is generated a regular interval to update the current temp of ur current location. in this way so many changes are going on the page without refreshing full page. And user also get a good feeling.(who wants to wait for whole page to load again)

Last edited by Luckychap : May 26th, 2008 at 7:43 am.

When you think you have done a lot, then be ready for YOUR downfall.

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Join Date: May 2008

Posts: 14

Reputation: luxmi_gee is an unknown quantity at this point

Rep Power: 1

Solved Threads: 0

luxmi_gee

Offline

Newbie Poster

Re: refresh

May 26th, 2008

•

Originally Posted by Luckychap

First I want to tell u if u want the whole page to refresh, then there is no need to use ajax. U just have to write a function which will load ur page every pireod of time..

Ajax is used to update small portion of the page in background without waiting for hole page to get refresh. You can use ajax to make ur page user-intractive, by peforming some small task in the backgound while the user is free to intract with the page.

Best example is: there is web page to display weather reports of various cities, and if user selects a city, the weather details corresponding to that city should be loaded in a div.
And here is where the real power of ajax comes. You can creata function which send an ajax request and get the weather details from server back to client, and according to data u can update the div with new value (Temp, images etc.) without refreshing the whole page. And what more, a second request is generated a regular interval to update the current temp of ur current location. in this way so many changes are going on the page without refreshing full page. And user also get a good feeling.(who wants to wait for whole page to load again)

thanks for your reply

here i paste my coding, but it has some error.
i don't where is the mistake.
cna you help me to sole that.

 Help with Code Tags 
 html Syntax (Toggle Plain Text) 
<html>
<head>
    <script>
function loadXMLDoc(url)
{
// code for Mozilla, etc.
if (window.XMLHttpRequest)
  {
  xmlhttp=new XMLHttpRequest()
  xmlhttp.Open("GET","index.jsp",true)
  xmlhttp.Send(null)
  xmlhttp.onreadystatechange=state_Change
  }
// code for IE
else if (window.ActiveXObject)
  {
  xmlhttp=new ActiveXObject("Microsoft.XMLHTTP")
    if (xmlhttp)
    {
    xmlhttp.open("GET","index.jsp",true)
    xmlhttp.Send()
    xmlhttp.onreadystatechange=state_Change
    }
  }
}
 
function init() {
window.setTimeout( "loadXMLDoc( \"index.jsp\" );", 1 );
// OR
// window.setTimeout( "loadXMLDoc( \"page.php?req=true\" );", 3000 );
}
</script>
</head>
<body onload="init();">
<div>
    <tlds:first  bgColor="#385CA8" color="WHITE" fontSize="12" 
             dateColor="yellow"  width="1398"  fontList="Arial" 
             latitudeDeg="12" latitudeN="58"  longitudeDeg="77"
             longitudeN="38" align="Center" >
                 LEMS
</tlds:first>
</div>
</body>
</html>
<html>
<head>
    <script>
function loadXMLDoc(url)
{
// code for Mozilla, etc.
if (window.XMLHttpRequest)
  {
  xmlhttp=new XMLHttpRequest()
  xmlhttp.Open("GET","index.jsp",true)
  xmlhttp.Send(null)
  xmlhttp.onreadystatechange=state_Change
  }
// code for IE
else if (window.ActiveXObject)
  {
  xmlhttp=new ActiveXObject("Microsoft.XMLHTTP")
    if (xmlhttp)
    {
    xmlhttp.open("GET","index.jsp",true)
    xmlhttp.Send()
    xmlhttp.onreadystatechange=state_Change
    }
  }
}

function init() {
window.setTimeout( "loadXMLDoc( \"index.jsp\" );", 1 );
// OR
// window.setTimeout( "loadXMLDoc( \"page.php?req=true\" );", 3000 );
}
</script>
</head>
<body onload="init();">
<div>
    <tlds:first  bgColor="#385CA8" color="WHITE" fontSize="12" 
             dateColor="yellow"  width="1398"  fontList="Arial" 
             latitudeDeg="12" latitudeN="58"  longitudeDeg="77"
             longitudeN="38" align="Center" >
                 LEMS
</tlds:first>
</div>
</body>
</html>

Last edited by peter_budo : May 31st, 2008 at 6:12 am. Reason: Keep It Organized - please use [code] tags

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Join Date: Mar 2008

Posts: 117

Reputation: Thirusha is an unknown quantity at this point

Rep Power: 1

Solved Threads: 13

Thirusha

Offline

Junior Poster

Re: refresh

May 27th, 2008

Help with Code Tags

(Toggle Plain Text)

// code for Mozilla, etc.
if (window.XMLHttpRequest)
{
xmlhttp=new XMLHttpRequest()
xmlhttp.Open("GET","index.jsp",true)
xmlhttp.Send(null)
xmlhttp.onreadystatechange=state_Change
}

should be

Help with Code Tags

(Toggle Plain Text)

// code for Mozilla, etc.
if (window.XMLHttpRequest)
{
xmlhttp=new XMLHttpRequest()
xmlhttp.open("GET","index.jsp",true)
xmlhttp.send(null)
xmlhttp.onreadystatechange=state_Change
}

U were using captial letters for open and send