随手写的一个动态添加删除行的HTC行为组件

<!--***************dtable.htc*******************-->
<method name=addnew><method/>
<method name=del><method/>
<method name=lighton><method/>
<property name=nowrow><property/>
<property name=overid><property/>
<property name=myid><property/>
<property name=color0><property/>
<property name=color1><property/>
<ATTACH EVENT="oncontentready" ONEVENT="init()" />
<script language=javascript>
function init()
{
 color0="#f8f4e4";     //行间隔色
 color1="#f0f0e8";      //行间隔色
 myid=0;
 nowrow=0;
 overid=1;
 element.cellSpacing=1;
 element.cellPadding=1;
 element.border=0;
 element.bgColor="#999999";   //边框颜色
 element.delcolor="#FFCC99";//删除按钮颜色
 element.delcolorover="#6699FF";//删除按钮颜色
 var baserow=element.rows[0];
 baserow.bgColor="#d8c8a8";    //标题行底色
 baserow.style.cursor="default";
 lastrow=element.rows[element.rows.length-1];
 t=element;
 initcolor();
//-----------------开始初始化已经存在的行----------------------
 for (i=1;i<t.rows.length;i++)
 {
  t.rows[i].style.backgroundColor=eval("color"+i%2);
  t.rows[i].attachEvent("onclick",lighton);
  t.rows[i].style.cursor="default";
  t.rows[i].cells[0].style.backgroundColor=element.delcolor;
  t.rows[i].cells[0].style.cursor="hand";
  t.rows[i].cells[0].attachEvent("onclick",delit);
  t.rows[i].cells[0].attachEvent("onmouseover",delmouseover);
  t.rows[i].cells[0].attachEvent("onmouseout",delmouseout);
 }
//------------开始备份最后一行为动态表复制元素----------------- 

 t.tr_className=lastrow.className;
 t.tr_cssText=lastrow.style.cssText;
 t.td_count=lastrow.cells.length;
 backupEvent("element.rows[element.rows.length-1]","TR");
 for(i=0;i<lastrow.cells.length;i++)
 {
  backupEvent("element.rows[element.rows.length-1].cells["+i+"]","TD"+i);
  t.td_cssText=lastrow.cells[i].style.cssText;
  eval("t.td_innerHTML"+i+"=lastrow.cells[i].innerHTML");
 }
//-------------------------备份完成----------------------------

}
function delmouseover()
{
 ln=rowid();
 element.rows[ln].cells[0].style.backgroundColor=element.delcolorover;
}
function delmouseout()
{
 ln=rowid();
 element.rows[ln].cells[0].style.backgroundColor=element.delcolor;
}
function lighton(line)
{
 ln=(line==null||line=="[object]")?rowid():line;
 row=element.rows[ln];
 initcolor();
 row.style.backgroundColor="#33FFFF";
 lightcolor(ln);
 nowrow=ln;
}
function delit()
{
 ln=rowid();
 if(element.rows.length!=2)
 {
  element.deleteRow(ln);
  initcolor();
 }
}
function del(line)
{
 element.deleteRow(line);
 initcolor();
}
function rowid()
{
 row=window.event.srcElement;
 while(row.tagName!="TR")row=row.parentElement;
 return(row.rowIndex);
}
function initcolor()
{
 for (i=1;i<element.rows.length;i++)
 {
  element.rows[i].style.backgroundColor=eval("color"+i%2);
  for(j=0;j<element.rows[i].cells.length;j++)
  {
   for(k=0;k<element.rows[i].cells[j].childNodes.length;k++)
   {
    if(element.rows[i].cells[j].childNodes[k].style!=undefined)
     element.rows[i].cells[j].childNodes[k].style.backgroundColor=eval("color"+i%2);
   }
  }
 }
}
function lightcolor(ln)
{
 i=ln;
 element.rows[i].style.backgroundColor="#33FFFF";
 for(j=0;j<element.rows[i].cells.length;j++)
 {
  for(k=0;k<element.rows[i].cells[j].childNodes.length;k++)
  {
   if(element.rows[i].cells[j].childNodes[k].style!=undefined)
    element.rows[i].cells[j].childNodes[k].style.backgroundColor="#33FFFF";
  }
 }

}
function addnew(line)
{
 ln=(line==null||line=="[object]")?element.rows.length:line;
 element.insertRow();
 for(i=0;i<element.td_count;i++)
 {
  element.rows[ln].insertCell();
 }
 element.rows[ln].style.cssText=element.tr_cssText;
 element.rows[ln].className=element.tr_className;
 restoreEvent("element.rows["+ln+"]","TR");
 cell=element.rows[ln].cells;
 for(i=0;i<cell.length;i++)
 {
  cell[i].innerHTML=eval("element.td_innerHTML"+i);
  cell[i].style.cssText=eval("element.td_cssText"+i);
  restoreEvent("element.rows["+ln+"].cells["+i+"]","TD"+i);
 }
 initcolor();
 t=element
 t.rows[ln].attachEvent("onclick",lighton);
 t.rows[ln].style.cursor="default";
 t.rows[ln].cells[0].style.backgroundColor=element.delcolor;
 t.rows[ln].cells[0].style.cursor="hand";
 t.rows[ln].cells[0].attachEvent("onclick",delit);
 t.rows[ln].cells[0].attachEvent("onmouseover",delmouseover);
 t.rows[ln].cells[0].attachEvent("onmouseout",delmouseout);
}
function copyEvent(tfrom,tto,str1,str2,xxx)
{
 eval(tto+"."+str2+"onactivate="+tfrom+"."+str1+"onactivate");
 eval(tto+"."+str2+"onbeforeupdate="+tfrom+"."+str1+"onbeforeupdate");
 eval(tto+"."+str2+"onblur="+tfrom+"."+str1+"onblur");
 eval(tto+"."+str2+"oncellchange="+tfrom+"."+str1+"oncellchange");
 eval(tto+"."+str2+"."+str1+"onchange");
 eval(tto+"."+str2+"."+str1+"onclick");
 eval(tto+"."+str2+"oncontextmenu="+tfrom+"."+str1+"oncontextmenu");
 eval(tto+"."+str2+"oncontrolselect="+tfrom+"."+str1+"oncontrolselect");
 eval(tto+"."+str2+"oncopy="+tfrom+"."+str1+"oncopy");
 eval(tto+"."+str2+"oncut="+tfrom+"."+str1+"oncut");
 eval(tto+"."+str2+"ondblclick="+tfrom+"."+str1+"ondblclick");
 eval(tto+"."+str2+"ondeactivate="+tfrom+"."+str1+"ondeactivate");
 eval(tto+"."+str2+"ondrag="+tfrom+"."+str1+"ondrag");
 eval(tto+"."+str2+"ondragend="+tfrom+"."+str1+"ondragend");
 eval(tto+"."+str2+"ondragenter="+tfrom+"."+str1+"ondragenter");
 eval(tto+"."+str2+"ondragleave="+tfrom+"."+str1+"ondragleave");
 eval(tto+"."+str2+"ondragover="+tfrom+"."+str1+"ondragover");
 eval(tto+"."+str2+"o