项目经验：css控制三个div在同一行展示的效果,float:left

/* 动态表样式 表头 */
.dv-table1-content
{
margin-top: 10px;
margin-bottom: 10px;
/*     margin-left: 20px; */
/*     padding-left:10px; */
/*     border: solid 1px #3e72b9; */
width: 200px;
font-size: 11px;
float: left;
}

.dv-table2-content
{
margin-top: 10px;
margin-bottom: 10px;
margin-left: 20px;
/*     padding-left:10px; */
/*     border: solid 1px #3e72b9; */
width: 200px;
font-size: 11px;
float: left;
}

.dv-table3-content
{
margin-top: 10px;
margin-bottom: 10px;
margin-left: 20px;
/*     padding-left:10px; */
/*     border: solid 1px #3e72b9; */
width: 650px;
font-size: 11px;
float: left;
/*     overflow-x:auto; */
}

<div id="bianjieshezhiquyu" style="width:1400px">
<!-- ------------入流数据表table1------------- -->
<div id="table1" class="dv-table1-content" >
<div >
<input type="text" style="width:99%; padding:0px; margin:0px"/>
</div>
<div style="text-align:right;">
<button style="height:20px;"  id="calculate1" onclick="calculate();" class="button white medium">导入入流数据</button>
</div>
<table  width="200px" border="1" cellspacing="0" cellpadding="0" class="altrowstable" style="margin:0px auto;">
<tr class='headcolor' >
<td >时间</td>
<td >流量(m³/s)</td>
</tr>
</table>
</div>
<!------------出流数据表table2------------->
<div id="table2" class="dv-table2-content">
<div >
<input type="text" style="width:99%; padding:0px; margin:0px"/>
</div>
<div style="text-align:right;">
<button style="height:20px;"  id="calculate2" onclick="calculate();" class="button white medium">导入出流数据</button>
</div>
<table  width="200px" border="1" cellspacing="0" cellpadding="0" class="altrowstable" style="margin:0px auto;">
<tr class='headcolor' >
<td >时间</td>
<td >流量(m³/s)</td>
</tr>
</table>
</div>
<!------------污染源数据表table3------------->
<div id="table3" class="dv-table3-content" style="overflow-x:auto">
<div  style="width:200px;">
<input type="text" style="width:99%; padding:0px; margin:0px"/>
</div>
<div style="text-align:center;width:200px;">
<button style="height:20px;"  id="calculate3" onclick="calculate();" class="button white medium">导入污染源数据</button>
</div>
<table  width="100%" border="1" cellspacing="0" cellpadding="0" class="altrowstable" style="margin:0px auto;">
<tr id="trheader" class='headcolor'  >
<td >时间</td>
</tr>
</table>
</div>
</div>