修改
JSFIDDLE看起来并不漂亮，但占位符在必要时到位。 仍然存在的问题是.cambria_project_popup和.hyatt_poject_popup无法在鼠标悬停时显示。
结束编辑 希望这是一个我忽略的简单问题，我在这里遇到两个不同的错误。
第一个是最初工作，然后停止了，我似乎无法弄清楚这是怎么回事。
其次，在容器内的不同位置（底部，右侧）使用相同的jquery函数进行定位是一个问题。
问题以粗体显示..
请参阅有关更新代码的条款
这是我的代码。与第一个问题有关的div是在.headerbottom容器中：
<div class="wtff"></div>
<div class="wall_solutions_popup"></div>
<div class="joist_solutions_popup"></div>
<div class="truss_solutions_popup"></div>
<div class="fab_net_popup"></div>
<!--end .headerbottom-->
这是完整的HTML
<div class="containerfab">
<div class="header">
<div class="headertop">
<img src="images2/login_butt.png" align="right" height "10%" width="7%" alt: "Log in to Amcon Steel Secured Site"/>
<!-- end .headertop -->
</div>
<div class="headerbottom"><a href="#"><img src="images2/AMCON_icon.png"
alt="Amcon Steel - Trusses - Joists - Wall Panels " name="Amcon_Steel_Logo" width="5%" height="80%" id="amconSteel_logo" style="padding-left:15px;" display:block; />
<img src="images2/AMCON_website_gallery_photos_1_0000s_0000s_0001_AMCONSTEEL-copy.png" alt="Amcon Steel - Trusses - Joists - Wall Panels " name="Amcon_Steel_Logo" width="35%" height="80%" id="amconSteel_logo" display:block; style="padding-right:75px;"/></a>
<!-- NavBar -->
<img src="images2/truss_solutions_butt.png" width="10%" height="80%" display:block; id="truss_solutions" />
<img src="images2/Joist_solutions_butt.png" width="10%" height="80%" display:block; id="joist_solutions" />
<img src="images2/wall_solutions_butt.png" width="10%" height="80%" display:block; id="wall_solutions" />
<img src="images2/fab_network_butt.png" width="13%" height="80%" display:block; id="fabricator_network" />
<!-- end NavBar-->
<div class="wtff"></div>
<div class="wall_solutions_popup"></div>
<div class="joist_solutions_popup"></div>
<div class="truss_solutions_popup"></div>
<div class="fab_net_popup"></div>
<!-- end .headerbottom -->
</div>
<!-- end .header -->
</div>
<div class="content">
<!-- absolute3 div is created for experiments with bottom project rollovers -->
<div class="absolute3"></div>
<table width="100%" height="70%" style="margin:20px 30px">
<tr>
<th style="color:white; text-shadow:2px 2px 2px black;font-size:28px; font-family:Frutiger; ">STEEL FLOOR JOISTS WITH MECHANICAL ACCESS</th>
<th></th>
</tr>
<tr>
<td width="65%" height="70%" background="images2/content_background.png" style="background-repeat:no-repeat; background-size:cover; padding:20px 20px; overflow:auto;">
<img src="images2/truss_solutions_img.png" align="left" height="20%" width="20%" style="padding:20px 10px 5px 10px;" />
<p style="padding:20px 10px 5px 10px; text-align:justify;"><b>Amconsteel</b> Joists are a cost-effective cold-formed steel (CFS) proprietary floor joist system ideally suited for the commercial and residential construction markets. The Amcon Joist combines the strength and consistency of a standard C-Shaped joist with the flexibility of pre-punched, reinforced access holes to greatly improve system installation time and architectural flexibility. Plumbing, HVAC, electrical and other technology services can be installed within the floor system, which makes installation easier while maintaining structural integrity.</p>
<p style="padding:5px 10px 5px 10px; text-align:justify;">All Amconsteel products are engineered to be perfectly compatible with one another, as well as with other corresponding structural products in the market. Backed by the strength and reliability of Amconsteel, the Amcon Joist System is an integral part of the <b>Amconsteel Total Solution</b>, Amcon's knowledge-oriented, solution-based approach to building.</p>
<div height="50%" width "50%" style="float:left;">
<img src="images2/joist_span_img.png" style="float:right;max-height:100%; max-width:100%;" />
<h3>Advantages</h3>
<ul>
<li>Architectural flexibility</li>
<li>High strength-to-weight ratio</li>
<li>Reduced need for onsite labor</li>
<li>Non-combustible</li>
<li>Environmentally responsible</li>
<li>High performance</li>
<li>Coordinates easily with MEP requirements</li>
<li>Dimensionally stable – does not rot, warp, split, crack or creep; and won’t expand or contract due to moisture content</li>
<li>Up to 10" diameter stiffened web punch-outs</li>
<li>Integrates easily with other building construction materials</li>
<li>Wide selection of sizes for many applications and long span conditions</li>
</ul>
</div>
</td>
<td width="35%" height="100%"></td>
</tr>
</table>
<!-- end .content -->
</div>
<div class="footer">
<table width="100%" height="100%">
<tr width="100%" height="100%">
<td width="3%" height="5%"><a href="http://www.facebook.com"><img src="images2/facebook_butt.png" style="padding-left:10px; display:block;"/></a>
</td>
<td width="3%" height="5%"> <a href="http://www.twitter.com"><img src="images2/twitter_butt.png" display:block; /></a>
</td>
<td width="3%" height="5%"> <a href="http://www.google.com"><img src="images2/email_butt.png" display:block; style="max-height:100%; max-width:100%" /></a>
</td>
<td width="10%" height="25%">
<p>Join Our Email List</p>
</a>
</td>
<td width="50%" height="10%">
<ps><a href="#">About Us</a> |<a href="#"> Gallery </a>| <a href="#">Technical Resources </a>| <a href="#">Standard Details </a>|<a href="#"> Contact Us</a>
</ps>
</td>
<td>
<img src="images2/CFSframing_project_butt.png" style="max-height:100%; max-width:100%" alt="Cold-Formed Steel(CFS) Projects" />
</td>
<td>
<img src="images2/Cambria_project_butt.png" style="max-height:100%; max-width:100%" />
</td>
<td>
<img src="images2/Hyatt_project_butt.png" style="max-height:100%; max-width:100%" />
</td>
<!-- end table-->
</tr>
</table>
<!-- end .footer -->
</div>
<!-- end .container -->
</div>
这是我的Jquery for show show / hide #fab_network 是第一个'bug'持续存在的地方，所有其他翻转工作正常，而#fab_network在某一点上工作正常，而不是确定出了什么问题，我试图重新创建新的div，但没有运气......
/* MouseOVer show/hide div, imgs. etc. */
$(document).ready(function () {
$('.wtff', '.joist_solutions_popup', '.truss_solutions_popup', 'wall_solutions_popup').show();
//When the Image is hovered upon, show the hidden div using Mouseover
$('#fabricator_network').hover(function () {
$('.wtff').fadeIn("slow");
}, function () {
$('.wtff').hide();
});
$('#wall_solutions').hover(function () {
$('.wall_solutions_popup').fadeIn("slow");
}, function () {
$('.wall_solutions_popup').hide();
});
$('#truss_solutions').hover(function () {
$('.truss_solutions_popup').fadeIn("slow");
}, function () {
$('.truss_solutions_popup').hide();
});
$('#joist_solutions').hover(function () {
$('.joist_solutions_popup').fadeIn("slow");
}, function () {
$('.joist_solutions_popup').hide();
});
});
此类中使用的div的CSS： .absolute3 是第二个问题所在，出于某种原因，我无法正确放置它。我试图将它放在右下角（这是“项目”的描述：
/* ~~ this container surrounds all other divs giving them their percentage-based width ~~ */
.container {
width: 80%;
max-width: 1260px;
min-width: 780px;
background-image:url(images2/backgroundslideshow.gif);
background-size:cover;
background-repeat:no-repeat;
margin: 0 auto;
z-index:0;
position:absolute;
}
<!-- absolute div is created for experiments with show/hide div rollovers WORKING ...well it was --> .wtff {
display:none;
position:relative;
top:0;
right:-80%;
width:150px;
height:250px;
max-width:100%;
max-height:100%;
background-color:#0F0;
z-index:100;
}
.truss_solutions_popup {
display:none;
position:relative;
top:0;
right:-47%;
width:150px;
height:250px;
max-width: 100%;
max-height:100%;
background-color:#0FF;
z-index:200;
}
.joist_solutions_popup {
display:none;
position:relative;
top:0;
right:-58%;
width:150px;
height:250px;
max-width: 100%;
max-height:100%;
background-color:#fF0;
z-index:200;
}
.wall_solutions_popup {
display:none;
position:relative;
top:0;
right:-68%;
width:150px;
height:250px;
max-width: 100%;
max-height:100%;
background-color:#ccc;
z-index:110;
}
<!-- absolute3 div is created for experiments with bottom project rollovers NOT POSITIONED PROPERLY--> .absolute3 {
display:block;
position:relative;
top:-90px;
right:-68%;
width:150px;
height:250px;
max-width: 100%;
max-height:100%;
background-color:#ccc;
z-index:120;
}
.containerfab {
width: 80%;
max-width: 1260px;
/* a max-width may be desirable to keep this layout from getting too wide on a large monitor. This keeps line length more readable. IE6 does not respect this declaration. */
min-width: 780px;
/* a min-width may be desirable to keep this layout from getting too narrow. This keeps line length more readable in the side columns. IE6 does not respect this declaration. */
background-image:url(images2/fab_network_background.png);
background-size:cover;
background-repeat:no-repeat;
margin: 0 auto;
/* the auto value on the sides, coupled with the width, centers the layout. It is not needed if you set the .container's width to 100%. */
z-index:0;
position:relative;
}
提前感谢您的帮助！我为HTML中的所有样式提前道歉（我通常在HTML中设计w / inline CSS然后转移到外部css表..）
答案 0 :(得分：0)
目前还不太清楚你要做什么+你的代码是一团糟。
最大宽度不需要：100％;和最小宽度：100％;如果你给出固定宽度。唯一的区别是IE6使用宽度作为最小宽度。否则宽度将是最大和最小宽度。通常，导航在语义上是一个列表，因此没有带有<a>元素的div，但带有<ul>和<li>元素的<a>是常态。在所有事情上也不需要绝对位置，只有在你真正需要创建一个“切出”层并将某些东西放在彼此之上时才使用它。否则你只是让自己变得困难，因为没有人会意识到内容流的其余部分。当你定位某些东西（绝对的或固定的）时，它们将被“切除”并放在一个新的层上。因此，其余内容并不知道。
关于.fab_net_popup：
的问题.fab_net_popup {
position: absolute; /* works if you change this to relative */
}
如果使用px而不是％作为宽度，则编码也更容易。稍后你仍然可以改变它。