HTML页面添加HTML代码的拼接字符串；以及js里面的小数计算

  （1）var tr = "";

        tr = '<tr><td>银行转账</td><td>'+O_AMOUNT+'</td><td>'+P_DT+'</td><td></td><td></td><td></td><td>'+P_HL_ZH+'</td>           <td>'+P_U_ZH+'</td><td>'+P_U_HM+'</td><td><a href="/go.html?url=javascript:void(0);" onclick="deleteCurrentRow(this,'+O_AMOUNT+')">删除</a></td></tr>';        tr = '<tr><td>银行转账&