Asterisk in stylesheet. VS gives me warning

I have following 2 lines in CSS file (I'm not CSS/html guy)

#main_text{background:#0083c3; padding-right:23px; *height:1%;}

#container{height:auto; *height:1%; padding-bottom:22px;}

Visual Studio 2010 gives following warning:

Unexpected character seq开发者_StackOverflow社区uence. Expected a property name for the "<property> : <value>" declaration.

Do I need those asterisks and what do they mean?

They are there for IE7 and older to apply the styles. Other browsers (including IE8 and newer) will ignore those height styles, as they are invalid CSS.

If you're not interested in supporting IE7 and older, you should take them out so that your CSS will validate and Visual Studio will no longer complain.