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Html+css+js_ table displays two different colors at every 3 rows

Source: Internet
Author: User
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1 <HTML>  2   <Head>  3       <Scripttype= "Text/javascript">  4         /**5 recently, as a result of the project needs, there is a problem:6 a table displays N records, with every 3 lines changing color, for example: Red background, 4,5,6 row green background, 7,8,9 row red background ... And so on 7         */8 window.onload=function() {  9                varTBL=document.getElementById ("Table"); //Get table FirstTen                varrows=Tbl.getelementsbytagname ("TR"); //get the line tr inside One                 for(i=0; I<Rows.length;i++) {  //traverse the rows inside A                       varJ=parseint (i/q); //with every 3 behavioral units, J is: 3 times 0, 3 times 1, 3 times 2 ... -                       if(J%2==0){ //then set the two colors to show every 3 lines by modulo - Rows[i].style.backgroundcolor="#f00"; the                       }Else{ - Rows[i].style.backgroundcolor="#0f0"; -                       }  -                }   +         };  -       </Script>   +   </Head>   A   <Body>   at     <TableID= "Table"Border= "1"width= "500px">   -        <TR><TD>1</TD></TR>   -        <TR><TD>2</TD></TR>   -        <TR><TD>3</TD></TR>   -        <TR><TD>4</TD></TR>   -        <TR><TD>5</TD></TR>   in        <TR><TD>6</TD></TR>   -        <TR><TD>7</TD></TR>   to        <TR><TD>8</TD></TR>   +        <TR><TD>9</TD></TR>   -        <TR><TD>10</TD></TR>   the        <TR><TD>11</TD></TR>   *        <TR><TD>12</TD></TR>   $        <TR><TD>13</TD></TR>  Panax Notoginseng        <TR><TD>14</TD></TR>   -        <TR><TD>15</TD></TR>   the        <TR><TD>16</TD></TR>   +        <TR><TD>17</TD></TR>   A        <TR><TD>18</TD></TR>   the     </Table>   +   </Body>   - </HTML>

The final effect of the above code is:

Html+css+js_ table displays two different colors at every 3 rows

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