javascript创建动态表单的方法

本文实例讲述了javascript创建动态表单的方法。分享给大家供大家参考。具体实现方法如下：

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<meta http-equiv="Content-Language" content="zh-CN" />
<meta name="Keywords" content="" />
<meta name="Description" content="" />
<title></title>
<style>
#tab {
border:1px solid #aaa;
border-collapse:collapse;
width:80%;
}
#tab th{
border:1px solid #aaaaaa;
background:#ECE9D8;
border-collapse:collapse;
padding:5px;
text-align:left;
}
#tab td{
border:1px solid #d8d8d8;
border-collapse:collapse;
padding:5px;
}
.txt{
  border:1px solid #888;
background:#ECE9D8;
}
.checkBg{
border:1px solid #aaaaaa;
background:#ECE9D8;
}
.checkTxt{
border:1px solid #aaa;
background:##d8d8d8;
}
.button {
  border:1px solid #888;margin:5px 0px;
  width:80px;background:#ECE9D8;height:22px;line-height:22px;
}
</style>
  <script language="javascript" type="text/javascript">
  function $(id) {return document.getElementById(id);}
  function $F(name){return document.getElementsByTagName(name);}
function add(){
  var otr = document.getElementById("tab").insertRow(-1);
  var checkTd=document.createElement("td");
  checkTd.innerHTML = '<input type="checkbox" class="check" onclick="ccolor()" name="checkItem">';
  var otd1 = document.createElement("td");
  otd1.innerHTML = '<input type="text" class="txt" name="infoName_txt" id="infoName_txt'+($('tab').rows.length-1)+'" maxlength="30" value=""/>';
  var otd2 = document.createElement("td");
  otd2.innerHTML = '<input type="text" class="txt" name="infoValue_txt" id="infoValue_txt'+($('tab').rows.length-1)+'" maxlength="30" value=""/>';
  otr.appendChild(checkTd);
  otr.appendChild(otd1);
  otr.appendChild(otd2);
}
function ccolor()
{
  var c1 = document.getElementsByName('checkItem');
  for(var i=0; i<c1.length; i++)
  if(c1[i].checked)
  {
   c1[i].parentNode.parentNode.className="checkBg";
   c1[i].parentNode.nextSibling.firstChild.className="checkTxt";
   c1[i].parentNode.nextSibling.nextSibling.firstChild.className="checkTxt";
  }
  else { c1[i].parentNode.parentNode.className="";
  c1[i].parentNode.nextSibling.firstChild.className="";
   c1[i].parentNode.nextSibling.nextSibling.firstChild.className="";}
}
function del(){
  var c = document.getElementsByName('checkItem');
  var idArray = new Array();
  for(var i=0; i<c.length; i++)
  if(c[i].checked)
  idArray.push(i);
  var rowIndex;
  var nextDiff =0;
  for(j=0;j< idArray.length;j++)
  {
  rowIndex = idArray[j]+1-nextDiff++;
  document.getElementById("tab").deleteRow(rowIndex);
  }
  }
function save(){
  var postString = $("postString");
   var checkboxs = document.getElementsByName("checkItem");
   var ttab = document.getElementsByName("infoName_txt");
   var tt2 = document.getElementsByName("infoValue_txt");
   var idArray = new Array();
   for(i=0;i<checkboxs.length;i++)
  {
   idArray.push(ttab[i].value + "|" + tt2[i].value);
  }
   postString.value = idArray.join("-");
   alert(postString.value);
}
  function alldell()
  {
  var des =document.getElementsByName('checkItem');
  for(var i=0;i<des.length;i++)
  {
  if(des[i].checked=document.getElementById('delall').checked){
  des[i].parentNode.parentNode.className="checkBg";
  des[i].parentNode.nextSibling.firstChild.className="checkTxt";
  des[i].parentNode.nextSibling.nextSibling.firstChild.className="checkTxt";}
  else{ des[i].parentNode.parentNode.className="";
   des[i].parentNode.nextSibling.firstChild.className="";
   des[i].parentNode.nextSibling.nextSibling.firstChild.className="";}
  }
  }
</script>
</head>
<body>
<input name="addv_btn" id="addv_btn" type="button" class="button" onClick="add();" value="add" />
<input name="del_btn" id="del_btn" type="button" class="button" onClick="del();" value="del" />
<input name="save" id="save" type="button" class="button" onClick="save();" value="save" /><br>
<table id="tab" >
<tr>
<th width="5%"><input type="checkbox" id="delall" onclick="alldell()"></td>
<th width="40%">Name</td>
<th width="55%">value</td>
</tr>
</table>
<p>
<input type="text" name="postString" id="postString">
</p>
</body>
</html>

希望本文所述对大家的javascript程序设计有所帮助。