Javascript innerHTML

Chris · Sep 24, 2003

How can I get the innerHTML of a <div> area only when the page loads, then use that variable in a function?

Here is my code:
function setContent(zz)
{
var lb = document.getElementById('leftbar').innerHTML;
var rb = document.getElementById('rightbar').innerHTML;
document.getElementById("myContent").innerHTML = "<span class=\"title_Page\">"+Page[zz]+"</span>";
if (zz=="home") {
document.getElementById('leftbar').innerHTML = lb;
document.getElementById('rightbar').innerHTML = rb;
document.getElementById('leftbar').style.width = '135px';
document.getElementById('rightbar').style.width = '135px';
}
else {
document.getElementById('leftbar').innerHTML = "";
document.getElementById('rightbar').innerHTML = "";
document.getElementById('leftbar').style.width = '0px';
document.getElementById('rightbar').style.width = '0px';
}
}

I want lb and rb to be set only once (i.e. only when the page loads the first time). I tried putting those variables outside the function, but when I do they, they show up as undefined. So how could i code it so that when the page loads, it assigns the innerHTML to the two variables, but not any other time while that page is open?

Chris

Chris · Sep 24, 2003

Remove the above two lines from the setContent function.

Use the bodys onload even to trigger a function that will set the global
variables to what you want.

var lb,rb;
function pageLoaded(){
lb = document.getElementById('leftbar').innerHTML;
rb = document.getElementById('rightbar').innerHTML;
}
<body onload="pageLoaded()">
Now, you can use the global lb and rb in your second function.

When I do that, both variables show undefined.

Chris

Chris · Sep 25, 2003

Test page online? I tested it in IE6 just to confirm my beliefs.

var someVar = "Not loaded";

function checkFunction(){
alert(someVar)
}
function pageLoaded(){
someVar = "Loaded";
}

<body onload="pageLoaded()">

<button onclick="checkFunction()">Check the Var</button>

The alert I get is "Loaded". Sounds like you are trying to call something
before it exists, hence the request to see a test page.

I've tested it on IIS. As for calling something before it exists, would you recommend I put the function in the page header, an external js file, or somehwere in the <body>?

Thanks, Chris

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Javascript innerHTML

Chris

Chris

Chris

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