js 二维数组求解

zxwancao 2011-10-23 04:53:04

二维数组，求解！！！
程序代码：
<html>
<head>
</head>
<body onload="checkall()">
<script language="javascript">
function checkall(){
var calc=open("","_blank");
calc.document.write("<table boder=1 width=400 >"+"<caption>all数组中一共有"+document.all.length+"个元素</caption><tr>");
for(var i=0;i<document.all.length;i++){
calc.document.write("<td>"+document.all[i].tagName+"</td>");
}
calc.document.writeln("</tr></table>");

//for(var i=0;i<document.all.length;i++){
var obj=["links","forms","anchors","scripts","images"];
for(j=0;j<obj.length;j++){
calc.document.write("<table boder=1 width=400 sytle='FONT-SIZE:xx-small'>"+"<caption>");
eval('calc.document.write(obj[j]+"数组中一共有"+document.'+obj[j]+'.length)');
calc.document.write("个元素</caption><tr>");
var len=0;
eval("len=document."+obj[j]+".length");
alert(len);
for(k=0;k<len;k++){
eval('calc.document.write("<td>"+document.'+obj[j]+'[i].name+"</td>")');
}
calc.document.writeln("</tr></table>");
}

calc.document.close();
}
</script>

<a href="" name=1></a>
<a href="" name="name1"></a>
<a href="" name="name2"></a>
<img name="img1"/>
<img name="img2">
</body>
<html>

运行以上代码报错

问题出在第24行，for循环中，对obj二维数组中的元素无法定位

求解。。！！

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zxwancao 2011-10-23

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嗯。。懂了，，多谢大大！！

hookee 2011-10-23

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<html>

<head>

</head>

<body onload="checkall()">

<script language="javascript">

function checkall(){

var calc=open("","_blank");

  calc.document.write("<table boder=1 width=400 >"+"<caption>all数组中一共有"+document.all.length+"个元素</caption><tr>");

  for(var i=0;i<document.all.length;i++){

  calc.document.write("<td>"+document.all[i].tagName+"</td>");

}

  calc.document.writeln("</tr></table>");





  //for(var i=0;i<document.all.length;i++){

  var obj=["links","forms","anchors","scripts","images"];

  for(j=0;j<obj.length;j++){

  calc.document.write("<table boder=1 width=400 sytle='FONT-SIZE:xx-small'>"+"<caption>");

  eval('calc.document.write(obj[j]+"数组中一共有"+document.'+obj[j]+'.length)');

  calc.document.write("个元素</caption><tr>");

  var len=0;

  eval("len=document."+obj[j]+".length");

  alert(len);

  for(k=0;k<len;k++){

  eval('calc.document.write("<td>"+document.'+obj[j]+'[' + k + '].name+"</td>")');

  }

  calc.document.writeln("</tr></table>");

  }

    

  calc.document.close();

}

</script>



<a href="" name=1></a>

<a href="" name="name1"></a>

<a href="" name="name2"></a>

<img name="img1"/>

<img name="img2">

</body>

<html>