#preLoad{display:none;}
#nav_main li{
	height:31px;
	width:157px;
	display:inline;
	margin:0;
	padding:0;
}
#nav_main ul,{
	padding-left:6px;
	padding:0;
}
#nav_main {
	width:942px;
	margin:0 auto;
}

#nav_main a{
	display:block;
	float:left;
	height:31px;
	width:157px;
}
.about a{background-image:url(../roofing-images/nav/images/nav-txRoof_01.jpg);}
.about a:hover{background-image:url(/roofing-images/nav/images/nav-txRoof-hov_01.jpg);}

.services a{background-image:url(../roofing-images/nav/images/nav-txRoof_02.jpg);}
.services a:hover{background-image:url(/roofing-images/nav/images/nav-txRoof-hov_02.jpg);}

.projects a{background-image:url(../roofing-images/nav/images/nav-txRoof_03.jpg);}
.projects a:hover{background-image:url(/roofing-images/nav/images/nav-txRoof-hov_03.jpg);}

.systems a{background-image:url(../roofing-images/nav/images/nav-txRoof_04.jpg);}
.systems a:hover{background-image:url(/roofing-images/nav/images/nav-txRoof-hov_04.jpg);}

.manufacturers a{background-image:url(../roofing-images/nav/images/nav-txRoof_05.jpg);}
.manufacturers a:hover{background-image:url(/roofing-images/nav/images/nav-txRoof-hov_05.jpg);}

.consultants a{background-image:url(../roofing-images/nav/images/nav-txRoof_06.jpg);}
.consultants a:hover{background-image:url(/roofing-images/nav/images/nav-txRoof-hov_06.jpg);}