Layers were the core of a method of dynamic HTML programming specific to Netscape 4. Each layer was treated as a separate document object in JavaScript. The content could be included in the same file within the non-standard But in modern browsers, the functionality of layers is provided by using an absolutely-positioned Irrelevant to the actual use of layers, when Netscape 4 and Internet Explorer had significantly different JavaScript implementations, a JavaScript program would very often need to run different blocks of code, depending on the browser. To decide which bunches of code to run, a JavaScript program would test for support for layers, regardless of whether the program involved layers at all. Namely,layer element (or any other element with the positioning set to "absolute" via CSS) or loaded from a separate file with layer = new Layer constructor. The content would then be inserted into the layer with layer.document.write.
div, or, for loading the content from an external file, an IFrame.
Famous quotes containing the words layer and/or element:
“A revolution is not the overturning of a cart, a reshuffling in the cards of state. It is a process, a swelling, a new growth in the race. If it is real, not simply a trauma, it is another ring in the tree of history, layer upon layer of invisible tissue composing the evidence of a circle.”
—Kate Millett (b. 1934)
“To get a man soundly saved it is not enough to put on him a pair of new breeches, to give him regular work, or even to give him a University education. These things are all outside a man, and if the inside remains unchanged you have wasted your labour. You must in some way or other graft upon the man’s nature a new nature, which has in it the element of the Divine.”
—William Booth (1829–1912)