October 1999
Intermediate to advanced
480 pages
14h 47m
English
Content preview from JavaScript Application Cookbook
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dhtml.js
- Practical use
DHTML layer creation, hiding, and revealing
- Version requirement
JavaScript 1.2
- Functions
genLayer(),hideSlide(),showSlide(),refSlide()
If you’ve been reading the book in order, you’ve seen this code in two previous applications (the slideshow and the multiple search engine interface). Figures 6-5 and 6-6 show the code that has created a layer and allows you to hide and show it at will.
Figure 6-5. “Eye-catching” DHTML: Now you see it
Figure 6-6. Now you don’t
Example 6.4 shows the contents of dhtml.js. I haven’t changed a thing. Check Chapter 3 and Chapter 5 for the code details.
Example 6-4. dhtml.js
1 var NN = (document.layers ? true : false); 2 var hideName = (NN ? 'hide' : 'hidden'); 3 var showName = (NN ? 'show' : 'visible'); 4 var zIdx = -1; 5 function genLayer(sName, sLeft, sTop, sWdh, sHgt, sVis, copy) { 6 if (NN) { 7 document.writeln('<LAYER NAME="' + sName + '" LEFT=' + sLeft + 8 ' TOP=' + sTop + 9 ' WIDTH=' + sWdh + ' HEIGHT=' + sHgt + ' VISIBILITY="' + sVis + 10 '" z-Index=' + zIdx + '>' + copy + '</LAYER>'); 11 } 12 else { 13 document.writeln('<DIV ID="' + sName + 14 '" STYLE="position:absolute; overflow:none;left:' + sLeft + 15 'px; top:' + sTop + 'px; width:' + sWdh + 'px; height:' + sHgt + 16 'px; visibility:' + sVis + ' z-Index=' ...Become an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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