刚才下下来随便看了一下文件,楼主的CSS文件里面用了28个左浮动,但是就是没见过一个清除浮动的标签,呵呵........ (浮动了后要记住清除哦!

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CSS样式:
@charset "gb2312";
/* CSS Document */
body,th,td{
margin:0px;
padding:0px;
font-size:13px;
color:#060933;
border-collapse:collapse;
}
/**************瀹瑰櫒*********************/
.box{
float:left;
width:950px;
height:350px;
}
.boxcenter{
float:left;
width:950px;
height:350px;
margin-right:2px;
}
/************时政新闻********************/
.box2{
float:left;
width:950px;
height:350px;
margin-bottom:5px;
padding:0px;
}
/********左边********/
.box2left{
float:left;
width:350px;
height:350px;
margin-right:5px;
}
.box2left1{
float:left;
width:348px;
height:198px;
margin-bottom:5px;
border:1px solid #bbc3d5;
}
/*********今日头条**********/
.toutiaotitle{
float:left;
width:348px;
height:15px;
FILTER: progid

XImageTransform.Microsoft.Gradient(gradientType=0,startColorStr=#f9fbfe,endColorStr=#d6e3f3);
padding-top:5px;
color:#FF0000;
font-weight:bold;
}
.toutiaocontent{
float:left;
width:350px;
height:180px;
}
/*****国内头条***************/
.toutiaocontentleft{
float:left;
width:175px;
height:180px;
}
.touleftpic{
float:left;
width:150px;
height:90px;
margin:10px;
}
.touleftwenzi{
float:left;
width:150px;
height:70px;
margin-left:10px;
text-indent:2em;
}
.touleftwenzi a:link{
font-size:13px;
color:#004080;
text-decoration:none;
}
.touleftwenzi a:visited{
font-size:13px;
color:#00172F;
text-decoration:none;
}
.touleftwenzi a:hover{
color:#060933;
text-decoration:underline;
}
.toutiaocontentright{
float:left;
width:175px;
height:180px;
}
.tourightpic{
float:left;
width:150px;
height:90px;
margin:10px;
}
.tourightwenzi{
float:left;
width:150px;
height:70px;
margin-left:10px;
text-indent:2em;
}
.tourightwenzi a:link{
font-size:13px;
color:#004080;
text-decoration:none;
}
.tourightwenzi a:visited{
font-size:13px;
color:#00172F;
text-decoration:none;
}
.tourightwenzi a:hover{
color:#060933;
text-decoration:underline;
}
/******社会新闻****************/
.box2left2{
float:left;
width:350px;
height:15px;
margin-bottom:5px;
}
/******高层动态***************/
.box2left3{
float:left;
width:348px;
height:123px;
border:1px solid #bbc3d5;
}
.gaocengtitle{
float:left;
width:348px;
height:15px;
padding-top:5px;
font-weight:bold;
color:#FF0000;
FILTER: progid

XImageTransform.Microsoft.Gradient(gradientType=0,startColorStr=#f9fbfe,endColorStr=#d6e3f3);
}
.gaocengcontent{
float:left;
width:348px;
height:103px;
margin-top:2px;
}
.gaocengcontent2{
float:left;
width:348px;
height:15px;
margin-top:2px;
}
.gaocengcontent2 a:link{
font-size:13px;
color:#004080;
text-decoration:none;
}
.gaocengcontent2 a:visited{
font-size:13px;
color:#00172F;
text-decoration:none;
}
.gaocengcontent2 a:hover{
color:#060933;
text-decoration:underline;
}
/*******中间************/
.box2center{
float:left;
width:240px;
height:350px;
margin-right:5px;
}
/*****社会热点**********/
.box2center1{
float:left;
width:238px;
height:253px;
margin-bottom:5px;
border:1px solid #bbc3d5;
}
.shehuititle{
float:left;
width:238px;
height:15px;
padding-top:5px;
FILTER: progid

XImageTransform.Microsoft.Gradient(gradientType=0,startColorStr=#f9fbfe,endColorStr=#d6e3f3);
font-weight:bold;
}
.shehuicontent{
float:left;
width:238px;
height:233px;
color:#663300;
}
.shehuicontent2{
float:left;
width:237px;
height:15px;
margin-top:2px;
padding-left:1px;
}
.shehuicontent2 a:link{
font-size:13px;
color:#004080;
text-decoration:none;
}
.shehuicontent2 a:visited{
font-size:13px;
color:#00172F;
text-decoration:none;
}
.shehuicontent2 a:hover{
color:#060933;
text-decoration:underline;
}
.box2center2{
float:left;
width:240px;
height:90px;
}
/********右边**************/
.box2right{
float:left;
width:350px;
height:350px;
}
.box2right1{
float:left;
width:348px;
height:203px;
margin-bottom:5px;
border:1px solid #bbc3d5;
}
/******图片新闻*******/
.box2right2{
float:left;
width:348px;
height:138px;
border:1px solid #bbc3d5;
}
.pictitle{
float:left;
width:348px;
height:15px;
padding-top:5px;
FILTER: progid:DXImageTransform.Microsoft.Gradient(gradientType=0,startColorStr=#f9fbfe,endColorStr=#d6e3f3);
}
.pic{
float:left;
width:90px;
height:105px;
margin:10px;
}
.pic1{
width:90px;
height:90px;
}
.pic2{
width:90px;
height:13px;
text-align:center;
padding-top:2px;
}
.pic2 a:link{
font-size:13px;
color:#004080;
text-decoration:none;
}
.pic2 a:visited{
font-size:13px;
color:#00172F;
text-decoration:none;
}
.pic2 a:hover{
color:#060933;
text-decoration:underline;
}