TAILIEUCHUNG - JavaScript Bible, Gold Edition part 47

JavaScript Bible, Gold Edition part 47. This book will bring programmers and non-technical professionals, including casual programmers and scripters, painlessly up to speed on all aspects of mastering JavaScript. Key topics include programming fundamentals, JavaScript language elements and how to use them effectively, and how to easily and efficiently add powerful new functionality to HTML documents and Java applets. | 308 Part III Document Objects Reference On the Example on the CD-ROM CD-ROm r Related Items properties. cols rows Value String Read Write NN2 NN3 NN4 NN6 IE3 J1 IE3 J2 IE4 IE5 Compatibility On the The cols and rows properties of a FRAMESET element object let you read and modify the sizes of frames after the frameset has loaded. These two properties are defined in the W3C DOM. Values for both properties are strings which may include percent symbols or asterisks. Therefore if you are trying to increase or decrease the size of a frame column or row gradually you must parse the string for the necessary original values before performing any math on them or in IE4 use the FRAME element object s height and width properties to gauge the current frame size in pixels . IE4 lets you completely modify the frameset by adjusting these properties. This includes adding or removing columns or rows to the frameset grid. Because a change in the frameset structure could impact scripts by changing the size of the frames array associated with the parent window or unloading documents that contain needed data be sure to test your scripts with both states of your frameset. If you want to remove a frame from a frameset view you might be safer to specify the size of zero for that particular row or column in the frameset. Of course a size of zero still leaves a one-pixel frame but it is essentially invisible if borders are not turned on and the one-pixel frame shares the same background color as the other frames. Another positive by-product of this technique is that you can restore the other frame with its document state identical from when it was hidden. When you have nested framesets defined in a single document be sure to reference the desired FRAMESET element object. One object may be specifying the columns while another nested one specifies the rows for the grid. Assign a unique ID to each FRAMESET element so that references can be reliably .

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