I was optimizing my site using gtmetrix and i see a suggestion of removing CSS Expressions. Can anybody please help me removing it as i am not aware of how to do it. tried googling it but could not figure it out

Below is the css code which has the expression.

Code: 
@import url("stylesheets/master.css");.aligncenter{display:block;margin-left:auto;margin-right:auto;} .alignleft{float:left;} .alignright{float:right;} #content img{border:3px solid #fff;max-width:616px;width:expression(this.width > 616 ? 616:true);}
Rox Reviewed by Rox on . How to remove CSS Expression? I was optimizing my site using gtmetrix and i see a suggestion of removing CSS Expressions. Can anybody please help me removing it as i am not aware of how to do it. tried googling it but could not figure it out :| Below is the css code which has the expression. @import url("stylesheets/master.css");.aligncenter{display:block;margin-left:auto;margin-right:auto;} .alignleft{float:left;} .alignright{float:right;} #content img{border:3px solid Rating: 5