JQuery popularity growing by leaps and bounds
If you type “JQuery” into Google Insights for Search, you will see an steeply upward trending curve indicating that more and more web searches are being done on the word “JQuery”.
If you have never heard of JQuery, it is time to find out at the official JQuery website. I would say that the next thing that a web designer should learn after Photoshop, HTML, and CSS, would be JQuery. After you know how to design a page in Photoshop, and then know how to build the page in HTML, and then know how to make it pretty with CSS, it is time to add interactivity such as animation, fades, element hiding, form validations, and so on — all of which can be accomplished with the help of JQuery.