Use this code
body {
}
#MenuControl {
margin-top:35px;
}
.DyMenuHoverStyle {
margin-top:1px;
float: left;
width: 390%;
height: 20px;
font: bold 12px verdana;
background: -moz-linear-gradient(silver, black);
}
#_TreeMenu {
width:20%;
}
.accordion {
width:100%;
}
.accordionHeader {
border: 1px solid #2F4F4F;
color: white;
background-color: #2E4d7B;
font-family: Arial, Sans-Serif;
font-size: 12px;
font-weight: bold;
padding: 5px;
margin-top: 5px;
cursor: pointer;
}
.accordionHeaderSelected {
border: 1px solid #2F4F4F;
color: white;
background-color: #5078B3;
font-family: Arial, Sans-Serif;
font-size: 12px;
font-weight: bold;
padding: 5px;
margin-top: 5px;
cursor: pointer;
}
.accordionContent {
background-color:aliceblue;
border: 1px none #2F4F4F;
border-top: none;
padding: 5px;
padding-top: 0px;
}
#mBody {
float:left;
margin-top:1px;
border:1px solid black;
height:100%;
width:100%;
}
#_Iframe {
margin-top:0px;
border:1px solid black;
width: 100%;
height:100%;
}
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This code put in "style" tag.it's work perfectly.
<style type="text/css">
#MenuControl {
margin-top:35px;
}
.DyMenuHoverStyle {
margin-top:1px;
float: left;
width: 390%;
height: 20px;
font: bold 12px verdana;
background: -moz-linear-gradient(silver, black);
}
#_TreeMenu {
width:20%;
}
.accordion {
width:100%;
}
.accordionHeader {
border: 1px solid #2F4F4F;
color: white;
background-color: #2E4d7B;
font-family: Arial, Sans-Serif;
font-size: 12px;
font-weight: bold;
padding: 5px;
margin-top: 5px;
cursor: pointer;
}
.accordionHeaderSelected {
border: 1px solid #2F4F4F;
color: white;
background-color: #5078B3;
font-family: Arial, Sans-Serif;
font-size: 12px;
font-weight: bold;
padding: 5px;
margin-top: 5px;
cursor: pointer;
}
.accordionContent {
background-color:aliceblue;
border: 1px none #2F4F4F;
border-top: none;
padding: 5px;
padding-top: 0px;
}
#mBody {
float:left;
margin-top:1px;
border:1px solid black;
height:100%;
width:100%;
}
#_Iframe {
margin-top:0px;
border:1px solid black;
width: 100%;
height:100%;
}