Code:
/*wrappers - page or section containers*/
#mainWrapper {
background-color: #ffffff;
text-align: left;
width: 750px;
vertical-align: top;
border: 1px solid #9a9a9a;
float: center;
}
#headerWrapper, #contentMainWrapper, #logoWrapper, #cartBoxListWrapper, #ezPageBoxList, #cartBoxListWrapper ul, #ezPageBoxList ul, #mainWrapper, #popupAdditionalImage, #popupImage {
margin: 0em;
padding: 0em;
}
float: center; is not a valid property value - you can use left, right or none.
margin: auto; will do what you want.
The #mainWrapper in the second rule makes the margin override the setting in the first rule. Remove #mainWrapper, from the second one.
Code:
/*wrappers - page or section containers*/
#mainWrapper {
background-color: #ffffff;
text-align: left;
width: 750px;
vertical-align: top;
border: 1px solid #9a9a9a;
margin: auto;
}
#headerWrapper, #contentMainWrapper, #logoWrapper, #cartBoxListWrapper, #ezPageBoxList, #cartBoxListWrapper ul, #ezPageBoxList ul, #popupAdditionalImage, #popupImage {
margin: 0em;
padding: 0em;
}