/*estructura*/
#head {width:900px; clear:both; height:123px; margin:0; padding:0; background:url(/prontus_aduana/imag/head/back_1024.jpg) no-repeat left top; text-align:left;}
#main, .main {width:900px; overflow:hidden; clear:both; background:url(/prontus_aduana/imag/arti/back_1024.gif) repeat-y left top; text-align:left;}
#footer {width:900px; clear:both; height:130px; background:url(/prontus_aduana/imag/foot/back_1024.jpg) no-repeat left top; text-align:center;}
.contArt {width:835px; clear:both; margin:0 0 50px 35px; padding:0; text-align:left;}