a-Hover Menu keeps disappearing on mouse over - html

Question

When I mouse over the services link the right hand side hover keeps disappearing. I have looked at the css and I cant seem to find where to fix it. This website is http://www.aoaluminiumproducts.com.au and my CSS is as below:
html
{ height: 100%;}
*
{ margin: 0;
padding: 0;}
body
{ font: 0.8em/1.5 "arial",sans-serif;
color: #303030;
background: #990000;
}
p
{ padding: 0 0 20px 0;
line-height: 1.7em;}
img
{ border: 0;}
h1, h2, h3, h4, h5, h6
{ font: normal 175% 'century gothic', arial, sans-serif;
color: #43423F;
margin: 0 0 15px 0;
padding: 15px 0 5px 0;}
h2
{ font: normal 200% 'century gothic', arial, sans-serif;
color: #1293EE;}
h4, h5, h6
{ margin: 0;
padding: 0 0 5px 0;
font: normal 120% arial, sans-serif;
color: #1293EE;}
h5, h6
{ font: italic 95% arial, sans-serif;
padding: 0 0 15px 0;
color: #000;}
h6
{ color: #362C20;}
a, a:hover
{ outline: none;
text-decoration: underline;
color: #CC0000;}
a:hover
{ text-decoration: none;}
.left
{ float: left;
width: auto;
margin-right: 10px;}
.right
{ float: right;
width: auto;
margin-left: 10px;}
.center
{ display: block;
text-align: center;
margin: 20px auto;}
blockquote
{ margin: 20px 0;
padding: 10px 20px 0 20px;
border: 1px solid #E5E5DB;
background: #FFF;}
ul
{ margin: 2px 0 22px 17px;}
ul li
{ list-style-type: circle;
margin: 0 0 6px 0;
padding: 0 0 4px 5px;}
ol
{ margin: 8px 0 22px 20px;}
ol li
{ margin: 0 0 11px 0;}
#main, #logo, #menubar, #site_content, #footer
{ margin-left: auto;
margin-right: auto;}
#header
{ background: #990000;
height: 240px;}
#logo
{ width: 810px;
position: relative;
height: 120px;
background: #150517; url(logo.png) no-repeat;}
#logo #logo_text
{ position: center;
top: 20px;
left: 0;}
#logo h1, #logo h2
{ font: normal 300% 'century gothic', arial, sans-serif;
border-bottom: 0;
text-transform: none;
margin: 0;}
#logo_text h1, #logo_text h1 a, #logo_text h1 a:hover
{ padding: 22px 0 0 0;
color: #FFF;
letter-spacing: 0.1em;
text-decoration: none;}
#logo_text h1 a .logo_colour
{ color: #FAF700;}
#logo_text h2
{ font-size: 100%;
padding: 4px 0 0 0;
color: #DDD;}
#menubar
{ width: 877px;
height: 72px;
padding: 0;
background: #150517; url(menu.png) repeat-x;
}
ul#menu, ul#menu li
{ float: left;
margin: 0;
padding: 0;}
ul#menu li
{ list-style: none;}
ul#menu li a
{ letter-spacing: 0.1em;
font: normal 100% 'lucida sans unicode', arial, sans-serif;
display: block;
float: left;
height: 37px;
padding: 29px 26px 6px 26px;
text-align: center;
color: #FFF;
text-transform: uppercase;
text-decoration: none;
background: transparent;}
ul#menu li a:hover, ul#menu li.selected a, ul#menu li.selected a:hover
{ color: #FFF;
background: #451C1B url(menu_select.png) repeat-x;}
ul#menu li ul#sub_nav
{
/*border:1px solid red;*/
position: absolute;
left: 0; top:35px;
padding: 15px 0;
width: 170px;
margin:0;
display:none;
background:#150517;
}
ul#menu li:hover #sub_nav
{
display:block;
}
#site_content
{ width: 900px;
overflow: hidden;
margin: 0 auto 0 auto;
padding: 20px 24px 20px 37px;
background: #DCDCDC;}
.sidebar
{ float: right;
width: 200px;
padding: 0 15px 20px 15px;}
.sidebar ul
{ width: 178px;
padding: 4px 0 0 0;
margin: 4px 0 30px 0;}
.sidebar li
{ list-style: none;
padding: 0 0 7px 0; }
.sidebar li a, .sidebar li a:hover
{ padding: 0 0 0 40px;
display: block;
background: transparent url(link.png) no-repeat left center;}
.sidebar li a.selected
{ color: #444;
text-decoration: none;}
#content
{ text-align: left; position: absoulte;
width: 595px;
padding: 0;}
#content ul
{ margin: 2px 0 22px 0px;}
#content ul li
{ list-style-type: none;
background: url(bullet.png) no-repeat;
margin: 0 0 6px 0;
padding: 0 0 4px 25px;
line-height: 1.5em;}
#footer
{ width: 878px;
font: normal 100% 'lucida sans unicode', arial, sans-serif;
height: 33px;
padding: 24px 0 5px 0;
text-align: center;
background: #000000;
color: #b1b1b1;
text-transform: uppercase;
letter-spacing: 0.1em;}
#footer a
{ color: #FFF;
text-decoration: none;}
#footer a:hover
{ color: #FFF;
text-decoration: underline;}
.search
{ color: #5D5D5D;
border: 1px solid #BBB;
width: 134px;
padding: 4px;
font: 100% arial, sans-serif;}
#colours
{ height: 0px;
text-align: right;
padding: 66px 16px 0px 300px;}
.form_settings
{ margin: 15px 0 0 0;}
.form_settings p
{ padding: 0 0 4px 0;}
.form_settings span
{ float: left;
width: 200px;
text-align: left;}
.form_settings input, .form_settings textarea
{ padding: 5px;
width: 299px;
font: 100% arial;
border: 1px solid #E5E5DB;
background: #FFF;
color: #47433F;}
.form_settings .submit
{ font: 100% arial;
border: 1px solid;
width: 99px;
margin: 0 0 0 212px;
height: 33px;
padding: 2px 0 3px 0;
cursor: pointer;
background: #7D0F0F;
color: #FFF;}
.form_settings textarea, .form_settings select
{ font: 100% arial;
width: 299px;}
.form_settings select
{ width: 310px;}
.form_settings .checkbox
{ margin: 4px 0;
padding: 0;
width: 14px;
border: 0;
background: none;}
.separator
{ width: 100%;
height: 0;
border-top: 1px solid #D9D5CF;
border-bottom: 1px solid #FFF;
margin: 0 0 20px 0;}
table
{ margin: 10px 0 30px 0;}
table tr th, table tr td
{ background: #DCDCDC;
color: #DCDCDC;
padding: 7px 4px;
text-align: left;}
table tr td
{ background: #DCDCDC;
color: #DCDCDC;
}
#testimonials{
width: 133px;
padding: 45px 45px 35px;
background:url('../img/quotes.png') no-repeat 20px 20px rgba(178,178,169,0.2);
min-height:90px;
-moz-border-radius:12px;
-webkit-border-radius:12px;
border-radius:12px;
}
#testimonials ul{ list-style:none;}
#testimonials p.text{ font-size:11px;}
#testimonials p.author{
color: #878787;
font-size: 16px;
font-style: italic;
text-align: left;
}
#testimonials p.author a,
#testimonials p.author a:visited{
color:#6aa42a;
}

Answer 1

If your intention is to make a drop down menu, then your li tag is missing position:relative property and sub menu gets stuck to the top of the page on the left. What you meant by hover keeps disappearing — I'm not so sure.

Answer 2

Hi the main thing is that you have defined position:absolute into your child id without defining position:relative to your parent id so that's why you hover drop-down is going some-where top.
so i have updated your css apply this one i hope this will work fine:-
ul#menu li {
list-style: none outside none;
position: relative;
}
ul#menu li ul#sub_nav {
background: none repeat scroll 0 0 #150517;
display: none;
margin: 0;
position: absolute;
top: 72px;
width: 155px;
}
Your Complete Updated CSS
html
{ height: 100%;}
*
{ margin: 0;
padding: 0;}
body
{ font: 0.8em/1.5 "arial",sans-serif;
color: #303030;
background: #990000;
}
p
{ padding: 0 0 20px 0;
line-height: 1.7em;}
img
{ border: 0;}
h1, h2, h3, h4, h5, h6
{ font: normal 175% 'century gothic', arial, sans-serif;
color: #43423F;
margin: 0 0 15px 0;
padding: 15px 0 5px 0;}
h2
{ font: normal 200% 'century gothic', arial, sans-serif;
color: #1293EE;}
h4, h5, h6
{ margin: 0;
padding: 0 0 5px 0;
font: normal 120% arial, sans-serif;
color: #1293EE;}
h5, h6
{ font: italic 95% arial, sans-serif;
padding: 0 0 15px 0;
color: #000;}
h6
{ color: #362C20;}
a, a:hover
{ outline: none;
text-decoration: underline;
color: #CC0000;}
a:hover
{ text-decoration: none;}
.left
{ float: left;
width: auto;
margin-right: 10px;}
.right
{ float: right;
width: auto;
margin-left: 10px;}
.center
{ display: block;
text-align: center;
margin: 20px auto;}
blockquote
{ margin: 20px 0;
padding: 10px 20px 0 20px;
border: 1px solid #E5E5DB;
background: #FFF;}
ul
{ margin: 2px 0 22px 17px;}
ul li
{ list-style-type: circle;
margin: 0 0 6px 0;
padding: 0 0 4px 5px;}
ol
{ margin: 8px 0 22px 20px;}
ol li
{ margin: 0 0 11px 0;}
#main, #logo, #menubar, #site_content, #footer
{ margin-left: auto;
margin-right: auto;}
#header
{ background: #990000;
height: 240px;}
#logo
{ width: 810px;
position: relative;
height: 120px;
background: #150517; url(logo.png) no-repeat;}
#logo #logo_text
{ position: center;
top: 20px;
left: 0;}
#logo h1, #logo h2
{ font: normal 300% 'century gothic', arial, sans-serif;
border-bottom: 0;
text-transform: none;
margin: 0;}
#logo_text h1, #logo_text h1 a, #logo_text h1 a:hover
{ padding: 22px 0 0 0;
color: #FFF;
letter-spacing: 0.1em;
text-decoration: none;}
#logo_text h1 a .logo_colour
{ color: #FAF700;}
#logo_text h2
{ font-size: 100%;
padding: 4px 0 0 0;
color: #DDD;}
#menubar
{ width: 877px;
height: 72px;
padding: 0;
background: #150517; url(menu.png) repeat-x;
}
ul#menu, ul#menu li
{ float: left;
margin: 0;
padding: 0;}
ul#menu li {
list-style: none outside none;
position: relative;
}
ul#menu li a
{ letter-spacing: 0.1em;
font: normal 100% 'lucida sans unicode', arial, sans-serif;
display: block;
float: left;
height: 37px;
padding: 29px 26px 6px 26px;
text-align: center;
color: #FFF;
text-transform: uppercase;
text-decoration: none;
background: transparent;}
ul#menu li a:hover, ul#menu li.selected a, ul#menu li.selected a:hover
{ color: #FFF;
background: #451C1B url(menu_select.png) repeat-x;}
ul#menu li ul#sub_nav {
background: none repeat scroll 0 0 #150517;
display: none;
margin: 0;
position: absolute;
top: 72px;
width: 155px;
}
ul#menu li:hover #sub_nav
{
display:block;
}
#site_content
{ width: 900px;
overflow: hidden;
margin: 0 auto 0 auto;
padding: 20px 24px 20px 37px;
background: #DCDCDC;}
.sidebar
{ float: right;
width: 200px;
padding: 0 15px 20px 15px;}
.sidebar ul
{ width: 178px;
padding: 4px 0 0 0;
margin: 4px 0 30px 0;}
.sidebar li
{ list-style: none;
padding: 0 0 7px 0; }
.sidebar li a, .sidebar li a:hover
{ padding: 0 0 0 40px;
display: block;
background: transparent url(link.png) no-repeat left center;}
.sidebar li a.selected
{ color: #444;
text-decoration: none;}
#content
{ text-align: left; position: absoulte;
width: 595px;
padding: 0;}
#content ul
{ margin: 2px 0 22px 0px;}
#content ul li
{ list-style-type: none;
background: url(bullet.png) no-repeat;
margin: 0 0 6px 0;
padding: 0 0 4px 25px;
line-height: 1.5em;}
#footer
{ width: 878px;
font: normal 100% 'lucida sans unicode', arial, sans-serif;
height: 33px;
padding: 24px 0 5px 0;
text-align: center;
background: #000000;
color: #b1b1b1;
text-transform: uppercase;
letter-spacing: 0.1em;}
#footer a
{ color: #FFF;
text-decoration: none;}
#footer a:hover
{ color: #FFF;
text-decoration: underline;}
.search
{ color: #5D5D5D;
border: 1px solid #BBB;
width: 134px;
padding: 4px;
font: 100% arial, sans-serif;}
#colours
{ height: 0px;
text-align: right;
padding: 66px 16px 0px 300px;}
.form_settings
{ margin: 15px 0 0 0;}
.form_settings p
{ padding: 0 0 4px 0;}
.form_settings span
{ float: left;
width: 200px;
text-align: left;}
.form_settings input, .form_settings textarea
{ padding: 5px;
width: 299px;
font: 100% arial;
border: 1px solid #E5E5DB;
background: #FFF;
color: #47433F;}
.form_settings .submit
{ font: 100% arial;
border: 1px solid;
width: 99px;
margin: 0 0 0 212px;
height: 33px;
padding: 2px 0 3px 0;
cursor: pointer;
background: #7D0F0F;
color: #FFF;}
.form_settings textarea, .form_settings select
{ font: 100% arial;
width: 299px;}
.form_settings select
{ width: 310px;}
.form_settings .checkbox
{ margin: 4px 0;
padding: 0;
width: 14px;
border: 0;
background: none;}
.separator
{ width: 100%;
height: 0;
border-top: 1px solid #D9D5CF;
border-bottom: 1px solid #FFF;
margin: 0 0 20px 0;}
table
{ margin: 10px 0 30px 0;}
table tr th, table tr td
{ background: #DCDCDC;
color: #DCDCDC;
padding: 7px 4px;
text-align: left;}
table tr td
{ background: #DCDCDC;
color: #DCDCDC;
}
#testimonials{
width: 133px;
padding: 45px 45px 35px;
background:url('../img/quotes.png') no-repeat 20px 20px rgba(178,178,169,0.2);
min-height:90px;
-moz-border-radius:12px;
-webkit-border-radius:12px;
border-radius:12px;
}
#testimonials ul{ list-style:none;}
#testimonials p.text{ font-size:11px;}
#testimonials p.author{
color: #878787;
font-size: 16px;
font-style: italic;
text-align: left;
}
#testimonials p.author a,
#testimonials p.author a:visited{
color:#6aa42a;
}