Explain the meaning and use of the z-index property in dhtml, Computer Networking

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QUESTION

(a) In CSS, each element in a document is considered to be in an invisible box. Give three ways how to make the box visible

(b) (i) Explain the meaning and use of the z-index property in DHTML

(ii) Distinguish between the parseInt() and parseFloat() functions

(c) Draw a diagram which explains where the different elements like Form, Window and Document, belong in the Document Object Model hierarchy and how properties are related to them

(d) Write JavaScript statement or a set of statements to accomplish each of the following-

(i) Calculate the value of 2.5 raised to the power of 3

(ii) Sum the odd integers between 1 and 99


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