A popup window is really just a smaller web page that pops up suddenly to display an advertisement. A pop up window is often called a pop up ad, yet to be a true pop up it must pop up over the web page that the user is viewing; the opposite of a pop up is a pop down ad, in which the pop up appears underneath the web page the user is viewing and remains there until the viewer notices and closes it.

Depending on how the scripting on the website is set up, an ad’s popup window will appear when certain actions are completed. Some popup ads open when new areas of the website are entered. Others open when certain elements of the website are clicked on; while other pages are set up so that the popups will load once the user attempts to download something. The popup advertisement is viewed by many advertisers a highly effective way of getting their information seen, because the popup is automatically viewed when the pop up box opens above the original web page.

Specific scripting is responsible for the annoying pop ups, such as JavaScript. The pop up image or pop up ad is usually just an advertisement attempting to induce shopping and impulse buying; however, some are spyware popups that allow computer viruses to infiltrate your computer hardware. Some can cause a seemingly endless stream of pop up windows to plague your computer screen, with more pop up windows popping up to replace each one that is closed.

New downloads are being created to block pop ups. Such programs stop pop ups by disabling the JavaScript menu that activates the popup window, thus not allowing it to pop up when the different triggering actions of the Internet user are innocently done. Popup killers will often display how many pop up ads were blocked since the Internet page was first opened. Some popup killers will not work on pop under ads, so a different blocking service may need to be downloaded and installed.

Matthew McMillan is a leading expert in the genital wart treatments. His works are regularly featured in online health publications on matters relating genital warts medication. For more information, visit TreatmentForGenitalWarts.com.