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multiple onLoad triggers: howto
Status: offline
remy
Forum User
Full Member
Registered: 06/09/03
Posts: 162
Location:Rotterdam & Bonn
Some javascripts, some blocks and some staticpages need to controle the window.onLoad event and do some stuff, like populating a drop down. They trigger the event window.onload or replace the function window.onload. A classic race condition.
This can be circumvented by defining a doubleDelegat function. This ensures that the various onLoad functions are executed one after each other.
// this should be in <head>…..</head>
<script language="JavaScript" type="text/javascript">
function makeDoubleDelegate(function1, function2) {
return function() {
if (function1)
function1();
if (function2)
function2();
}
}
</script>
// this is put in place where you need it
<script language="JavaScript" type="text/javascript">
myWindowInit=function() {
// do your stuff
}
window.onload = makeDoubleDelegate(window.onload, myWindowInit);
</script>
This can be circumvented by defining a doubleDelegat function. This ensures that the various onLoad functions are executed one after each other.
Text Formatted Code
// this should be in <head>…..</head>
<script language="JavaScript" type="text/javascript">
function makeDoubleDelegate(function1, function2) {
return function() {
if (function1)
function1();
if (function2)
function2();
}
}
</script>
// this is put in place where you need it
<script language="JavaScript" type="text/javascript">
myWindowInit=function() {
// do your stuff
}
window.onload = makeDoubleDelegate(window.onload, myWindowInit);
</script>
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