this keyword can be very important but it is also confusing as not clear what it refers to at times.
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Also not always clear when needed
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Here is an example of use to set URL for a link
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function seturl(obj) { // Put in <head></head> Part of document
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obj.target = "Desiredframe"; // set frame you want it to go in!
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obj.href="http://www.npac.syr.edu"; // or calculate URL dynamically
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}
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In normal HTML page place:
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<a href="" onClick="seturl(this)" onMouseOver="window.status='URL set dynamically in routine seturl';return true" >Click Here for Dynamic URL</a>
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Here this refers to link object created by <a ..> </a>
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window.status is line at bottom which usually records URL
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Note can specify nontrivial href and onClick but if onClick specifies href property it overrides that in HTML page
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