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function addRow(){
  //¶¯Ì¬²åÈëÒ»ÐÐ
  var oRow1=mediaMes.insertRow(mediaMes.rows.length);
  //ÉèÖÃtrµÄid
  oRow1.id="tr"+thisId;
  //»ñµÃ±í×ܵÄÐÐÊý
  var aRows=mediaMes.rows;
  //»ñµÃÐÂÌí¼ÓÐеÄÁм¯ºÏ
  var aCells=oRow1.cells;
  //ÔÙÐÂÌí¼ÓµÄÐÐÀïÃæ²åÈëÒ»¸öÁÐ
  var oCell1_1=aRows[oRow1.rowIndex].insertCell(aCells.length);
  //=================ÉèÖÃÁеÄÑùʽ======================
  oCell1_1.align="center";
  var oStyle1 = oCell1_1.getAttribute("style");
  //Ieä¯ÀÀÆ÷¶¯Ì¬ÉèÖÃÑùʽ²»ÄÜÖ±½Ó¸øÐлòÁÐÖ¸¶¨classÊôÐÔ
  //ÒªÏȰÑÑùʽ·Åµ½Ò»¸ö¶ÔÏóµÄattributeÀïÃæ£¬È»ºóÔÚ°ÑÕâ¸ö¶ÔÏóÉèÖõ½ÐлòÁÐÀïÃæÈ¥
  // ie
     if(oStyle1 == "[object]") {
      oStyle1.setAttribute("cssText","border-right: 1px solid #003399;border-bottom: 1px solid #003399;");
        oCell1_1.setAttribute("style",oStyle1 );
     } else {
   oCell1_1.setAttribute("class","td_border" );
     }
  var cell1="<input type='text' name="user"  id='user'/>";
  oCell1_1.innerHTML=cell1;
}


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JavaScript FAQ£¨¶þÊ®Èý£©

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1¡¢Ê²Ã´ÊÇBookmarklet£¿£¨What's a Bookmarklet?£©
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JavaScript prototype ÊôÐÔ

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The prototype property allows you to add properties and methods to an
object.
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Syntax
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object.prototype.name=value
Example 1
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In this example we will show how to use the prototype property to add a
property to an object:
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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" >
<head>
    <title>ÑéÖ¤ÓÊÏ䵨ַºÏ·¨ÐÔ</title>
    <sc ......
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