what the numbers 1, 4 ,6 below browser support

[gauravc7]

what do the marking means, to some extent it clears that it's for browser support & w3c recomndation. but what is 1,4,6 why? this type of numbers.is this a catagory or support level out of 10 or something??

[scott100]

It just means the browser version, likeInternet Explorer 6Firefox 1Opera 8

[justsomeguy]

To elaborate, it means the first browser version that the item shows up in. So to take this example from the CSS ref:

color   Sets the color of a text   color   3  1  4  1

This means that the color property first showed up in IE version 3, Firefox version 1, and Netscape version 4. The 1 on the end means that it was in CSS v1.Or another example from HTML:

<span>   Defines a section in a document   4.0   3.0   STF

Here the 4.0 means available since Netscape 4.0, the 3.0 means available since IE 3.0, and the STF means it shows up in the Strict, Transitional, and Frameset doctypes.