JavaScript onLoad event clashing
This week I had to debug some asp.net pages that has a weird behavior. They work well but each time a Js alert() raise, the hover menu are no more available (it is a classic asp:menu with dynamic hover for sub-menu).
The problem was simple: the current function attached to window.onload (which display the hover menu) was ripped by another one (which throw the alert).
Keep in mind that such line window.onload = alert('warning!'); remove the existing function attached to onload event.
To prevent this I added a new function on the Js library :
function AddOnload(funcToAdd)
{
if (window.onload)
{
var currentfunc = window.onload;
window.onload = function()
{
currentfunc();
funcToAdd();
}
}
else
{
window.onload = funcToAdd;
}
}
And now I call the script like this:
AddOnload(alert('warning!'));
I am sure there are plenty of ways to do this, but this worked fine for me.