急救！表格于表格之间有缝隙，请问如何解决
这是有问题的代码：
<table   width= "1023 "   border= "0 "   cellpadding= "0 "   cellspacing= "0 ">
                <tr>
                    <td   height= "75 "   colspan= "4 "> <img   src= "images/bbmzl_1.jpg "   width= "1023 "   height= "75 "   border= "0 "   usemap= "#Map "   />
<map   name= "Map "   id= "Map ">
    <area   shape= "rect "   coords= "321,37,371,64 "   href= "bbzt.html "   />
<area   shape= "rect "   coords= "259,34,311,60 "   href= "bbdd.html "   />
<area   shape= "rect "   coords= "384,37,431,64 "   href= "bbzl.html "   />
    <area   shape= "rect "   coords= "606,38,655,63 "   href= "bbbz1.html "   />
        <area   shape= "rect "   coords= "664,38,716,65 "   href= "bbbz2.html "   /> <area   shape= "rect "   coords= "724,39,775,62 "   href= "bbbz3.html "   />
</map> </td>
                </tr>
                <tr>
                    <td   height= "70 "   colspan= "4 "> <img   src= "images/bbmzl_2.jpg "   width= "1023 "   height= "70 "   /> </td>
                </tr>
                <tr>
                    <td   width= "279 "   height= "319 "> <img   src= "images/bbmzl_3.jpg "   width= "279 "   height= "319 "   /> </td>
                    <td   width= "316 "   height= "319 "> <img   src= "images/bbmzl_4.jpg "   width= "316 "   height= "319 "   /> </td>
                    <td   width= "226 "   height= "319 "> <img   src= "images/bbmzl_5.jpg "   width= "226 "   height= "319 "   /> </td>
                    <td   width= "202 "   height= "319 "> <img   src= "images/bbmzl_6.jpg "   width= "202 "   height= "319 "   /> </td>
                </tr>
                <tr>
                    <td   height= "119 "   colspan= "4 "> <img   src= "images/bbmzl_7.jpg "   width= "1023 "   height= "119 "   /> </td>