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css "class" and "id" seems confusing....?


shad

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<html><head><style type="text/css">#customers{font-family:"Trebuchet MS", Arial, Helvetica, sans-serif;width:100%;border-collapse:collapse;}#customers td, #customers th{font-size:1em;border:1px solid #98bf21;padding:3px 7px 2px 7px;}#customers th{font-size:1.1em;text-align:left;padding-top:5px;padding-bottom:4px;background-color:#A7C942;color:#ffffff;}#customers tr.alt td{color:#000000;background-color:#EAF2D3;}</style></head><body><table id="customers"><tr>  <th>Company</th>  <th>Contact</th>  <th>Country</th></tr><tr><td>Alfreds Futterkiste</td><td>Maria Anders</td><td>Germany</td></tr><tr class="alt"><td>Berglunds snabbköp</td><td>Christina Berglund</td><td>Sweden</td></tr><tr><td>Centro comercial Moctezuma</td><td>Francisco Chang</td><td>Mexico</td></tr><tr class="alt"><td>Ernst Handel</td><td>Roland Mendel</td><td>Austria</td></tr><tr><td>Island Trading</td><td>Helen Bennett</td><td>UK</td></tr><tr class="alt"><td>Königlich Essen</td><td>Philip Cramer</td><td>Germany</td></tr><tr><td>Laughing Bacchus Winecellars</td><td>Yoshi Tannamuri</td><td>Canada</td></tr><tr class="alt"><td>Magazzini Alimentari Riuniti</td><td>Giovanni Rovelli</td><td>Italy</td></tr><tr><td>North/South</td><td>Simon Crowther</td><td>UK</td></tr><tr class="alt"><td>Paris spécialités</td><td>Marie Bertrand</td><td>France</td></tr></table></body></html>

nowConfusion 1) <table id="customers"> will the id=customers inherit the properties of all the above #customers defined in the style. Confusion 2)I referred the class and id selector tutorial for css here http://www.w3schools.com/css/css_id_class.asp and also referred the above example code there seems some contradiction between tutorial and example(taken from http://www.w3schools.com/css/tryit.asp?filename=trycss_table_fancy) The Contradiction which I feel is when we use id selector we give(eg:- #customers) we don't any extra text but in the above example (#customers td, #customers th) and moreover (#customers tr.alt td) but in the tutorials there are no details given regarding that we can use class and id can be used in same line confusion 3) (#customers tr.alt td) this line of text in the above example seems alien?I would be very much thankful if someone can take the pain to clarify my confusion? :rolleyes:

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(2) You are not adding extra text to the id selector!Just learn about selectors, and you ll understand how it works.

#customers td,#custormers th{}

Means: assign the properties in between {and} to any <td> that is inside the <table> (a child of the <table>) with id="Customers" and also assign the same properties, to any <th>, that is also a child of

<table id="customers">

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#customers = the parent element meaning everything within in it from <table> to </table> will adopt the style applied here, #customers td, #customers th = will be applied to all td and th element, overwriting any identical styling set from above. #customers th = will be applied to all th element, overwriting any identical styling set from above. #customers tr.alt td = will target a td element whose parent tr element (tr parent element of td, table parent element of th, tr, td etc) has class name 'alt' overwriting any identical styling set from above.

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