How to capture the close event of an opened window by window.open() in JavaScript?
This JavaScript code works well for me:
var newwindow = window.open("/newwindow.html");
newwindow.onbeforeunload = function () {
// processing event here
alert("new window closed");
}
Note that after the callback function is executed, the newwindow is closed.
How to disable the reverse DNS lookup by the SSD server on Linux? To turn off reverse DNS lookups of the SSH daemon, log on the server and add UseDNS no to /etc/ssh/sshd_config. And remember to restart the sshd service by service sshd restart or systemctl restart sshd.service or other commands depending on your system….
What are the x86-64 instructions for floating-point comparisons like the cmpq for quard-word integer comparison? The SSE3 extenstions provide two instructions for comparing floating values: Instruction Based on Description ucomiss S2, S1 S1 – S2 Compare single precision ucomisd S2, S1 S1 – S2 Compare double precision As with cmpq, they follow the GAS convention…
Linux boots failed with “sulogin: can not open password database” while the /etc/passwd and /etc/shadow files look fine. How to fix this? The OS is Fedora 22. You may try this trick Step 1: boot Linux with rw init=/bin/bash following this tutorial. Step 2: after Linux booted, disable SELinux following this tutorial. Reboot. If it…
I want to learn transactional memory technologies. Any suggestions on Transactional memory learning materials? Thanks! I highly suggest the Transactional Memory lecture by James R. Larus and Ravi Rajwar of Synthesis Lectures on Computer Architecture: The Transactional Memory lecture:http://www.morganclaypool.com/doi/abs/10.2200/S00070ED1V01Y200611CAC002 Link to the PDF:http://www.morganclaypool.com/doi/pdf/10.2200/S00070ED1V01Y200611CAC002 Read more: Mmaping Memory Range Larger Than the Total Size of Physical…
I am using Fedora 20. I installed the rpm from Oracle for the Oracle JDK. How to set up the environment so that the Java environment is Oracle JDK instead of the OpenJDK? The Oracle JDK is install to /usr/java/ directory. On my Fedora 20, it looks like this: $ ls /usr/java -l total 4…
The “Entering/Leaving…” messages when invoking another make by a make is kind of annoying. Is it possible to suppress these messages and how to suppress them? For GNU make, it is controlled by options: -w, –print-directory Print a message containing the working directory before and after other processing. This may be useful for tracking down…