body {margin:0; padding:0; background:url(images/wr_body.gif) top left;}
<div id="idCapita"></div> 
<script> 
// Obtenemos el elemento por su identificador 
var d  = document.getElementById("idCapita"); 
d.innerHTML = "El contenido ha sido modificado! <img src='imagen.jpg'>"; 
</script>
table, td {border-collapse:collapse;}
table, td, img {border:0;}
form, td {margin:0; padding:0;}
td{font:11px/12px tahoma, arial, helvetica, sans-serif; color:#292727; vertical-align:top;  text-align:left; line-height:16px;}
td p {font:13px/14px tahoma, arial, helvetica, sans-serif; color:#292727; vertical-align:top;  text-align:justify; text-indent: 3px; line-height:16px;}
a{ color:#8B2323;text-decoration:none; }
a:hover {color: #8B2500; text-decoration:none ; background-color: #FFC125;}
a:visited{ color:#FF4500}
ul {list-style:none; padding:0;}


.r1 ul { margin:0; padding:0; list-style:none;}
.r1 li { background:url(images/r1.gif) center left no-repeat; margin:0 0 0 0; padding:0 0 0 11px;}
.r1 li a {line-height:16px; color:#FD7914; text-decoration:underline;}
.r1 li a:hover { text-decoration:none; color:#FD7914;}

#menu {  text-align: center;font:13px/14px
font-size: 0.7em;
width: 1200px;
margin: 2px auto;
position: relative;
}
#menu ul { list-style-type: none;}

#menu ul li.nivel1 { float: left;
width: 100px;
margin-right: 2px;

position: relative;
}
#menu ul li { float: left;}

#menu ul li a {display: block;
text-decoration: none;
color: white;
background-color: orange;
padding: 4px;
position: relative;


}
#menu ul li a:hover, #menu ul li:hover a.nivel1 {background-color: white;
color: orange;
position: relative;
border-bottom: solid 1px orange;
}
#menu ul li a.nivel1 {display: block!important;display: none;
}
#menu ul li ul {display: none;
}
#menu ul li a:hover ul, #menu ul li:hover ul {display: block;
position: absolute;width: 700px;border: solid 0px;border-top: none;background-color: orange;
}
#menu ul li ul li a {width: 100px;
padding: 4px 0px 4px 0px;
border: none;
background-color: orange;
}
#menu ul li ul li a:hover {
position: relative;
text-decoration: underline;
border-bottom: none;
}
table.falsa {border-collapse:collapse;
border:0px;
float: center;
position: relative;
}
ul.uno {left: -40px;}
ul.dos {left: -142px;}
ul.tres {left: -244px;}
ul.cuatro {left: -346px;}
ul.cinco {left: -448px;}
ul.seis {left: -550px;}
ul.siete {left: -652px;}
ul.ocho {left: -754px;}
ul.nueve {left: -856px;}
ul.diez {left: -958px;}

/*header*/
.indent_logo{ height:101px;}
.indent_logo img{ margin:7px 0 0 0px;}
.menu{ height:0px;}
.menu a{  }
.menu a:hover {background:#FFFFFF; text-decoration:underline; }
.menu a:visited{ color:#FF4500}
.top_line{ height:18px; width:100%; background:#9BCD9B; text-decoration:none; color:white; vertical-align:middle;}
.top_line a{ height:18px; width:100%; background:#9BCD9B; text-decoration:none; color:white; vertical-align:middle;}
.top_line a:hover{ height:18px; width:100%; background:#9BCD9B; text-decoration:none; color:red; vertical-align:middle;}
.big_foto{ height:173px; padding:0px;}

/*footer*/
.footer{ color:#828282; text-align:center; padding:20px 0 14px 0;}
.footer a{color:#828282; text-decoration:underline;}
.footer a:hover{ color:#828282; text-decoration:none;}
.footer span{ color:#5F5C5C; word-spacing:21px;}
.footer span a{ color:#5F5C5C; text-decoration:none; word-spacing:normal;}
.footer span a:hover{ color:#5F5C5C; text-decoration:underline;}




/*wrapper*/
.wr_white { width:100%;}
.wr_white .t { background:#FFFFFF url(images/m2-l-t.gif) no-repeat left top;}
.wr_white .b { background:url(images/m2-r-t.gif) no-repeat right top;}
.wr_white .l { background:url(images/m2-l-b.gif) no-repeat left bottom;}
.wr_white .r { background:url(images/m2-r-b.gif) no-repeat right bottom;}

.wr_white_dark { width:100%;}
.wr_white_dark .t { background:#F9FAF6 url(images/m2-l-t2.gif) no-repeat left top;}
.wr_white_dark .b { background:url(images/m2-r-t2.gif) no-repeat right top;}
.wr_white_dark .l { background:url(images/m2-l-b2.gif) no-repeat left bottom;}
.wr_white_dark .r { background:url(images/m2-r-b2.gif) no-repeat right bottom;}

.wr_white li { background:url(images/wr_white_x.gif) bottom left repeat-x; margin:0 0 0 0; padding:0 0 5px 0; width:155px;}
.wr_white li a { background:url(images/image025.gif) center left no-repeat; line-height:22px; color:#4E4D4D; text-decoration:none; padding-left:17px;}
.wr_white li a:hover { text-decoration:none; color:#D6300D;}

/**/

.wr_green { width:100%;}
.wr_green .t { background:orange url(images/m2-l-t1.gif) no-repeat left top;}
.wr_green .b { background:url(images/m2-r-t1.gif) no-repeat right top;}
.wr_green .l { background:url(images/m2-l-b1.gif) no-repeat left bottom;}
.wr_green .r { background:url(images/m2-r-b1.gif) no-repeat right bottom;}

.wr_green li { background:url(images/image025.gif) top left no-repeat; margin:0 0 0 0; padding:0 0 0 24px;}
.wr_green li a {  line-height:18px; color:#292727; text-decoration:none;}
.wr_green li a:hover { text-decoration:none; color:#292727}


/*content*/
.bgr1{background:none !important}
.h{ background:url(images/h.gif) top left no-repeat; height:20px;}
.h img{ margin:0 0 0 25px;}

.img1 img{ margin-right:19px;}

strong a{ color:#3081AB;  background:url(images/marker.gif) no-repeat left top; background-position:0 4px; padding-left:10px; text-decoration:none; font-size:9px; text-transform:uppercase; font-family:Verdana, Arial, Helvetica, sans-serif}
strong a:hover{ text-decoration:none; color:#D6300D;}

.col_2 strong a{ color:#3081AB;  background:url(images/marker1.gif) no-repeat left top; background-position:0 3px; padding-left:10px; text-decoration:none; font-size:9px; text-transform:uppercase; font-family:Verdana, Arial, Helvetica, sans-serif}
.col_2 strong a:hover{ text-decoration:none; color:#3081AB;}

.line_x{ background:url(images/line_x.gif) top left repeat-x; width:100%; height:3px; margin:9px 0 10px 0;}

.text1{ line-height:12px;tex-aling: justify;font-size:13px;}
.text1 span{ font-size:12px; color:red;}
.text1 span img{ vertical-align:middle; margin:0 7px 0 0;}

.indent_img{width:419px;}
.indent_img img{margin:2px 4px 2px 2px; float:left}
.link{padding:2px 0 0 0; text-align:right;}

.text2{padding:7px 31px 16px 15px; color:#4E4D4D;text-indent: 18px}
.text2 div{ margin-top:11px;}
.text2 a{ color:#D6300D; text-decoration:underline}
.text2 a:hover{ color:#D6300D; text-decoration:none}
.text2 strong{ display:block;}