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How to check and unselect all with single checkbox?

32
hi i have created function that automatically adds rows with chekcboxes. i can create two button that one serves checking all checkboxes and the another one serves for unchecking rows. but i would like to check/uncheck all checkboxes with single checkbox.
then i have created checkbox for the purpose to check or uncheck all checkboxes. but it neigther checks nor unchecks all
here is script
Expand|Select|Wrap|Line Numbers
  1. <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
  2. <html xmlns="http://www.w3.org/1999/xhtml">
  3. <head>
  4. <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
  5. <title>Untitled Document</title>
  6. <script>
  7. var a=0;
  8. function add(){
  9.     a++;
  10.  
  11.  
  12.     var cedvel=document.getElementById("tab");
  13.  
  14.  
  15.     if(a>cedvel.rows.length){
  16.  
  17.         a=cedvel.rows.length;
  18.  
  19.         }
  20.  
  21.  
  22.  
  23.     var sira=cedvel.insertRow(a);
  24.  
  25.     var isare=sira.insertCell(0);
  26.     var solteref=sira.insertCell(1);
  27.     var sagteref=sira.insertCell(2);
  28.  
  29.     var birinci=document.createElement('input');
  30.     birinci.type='checkbox';
  31.     isare.appendChild(birinci);
  32.  
  33.     solteref.innerHTML=a+1;
  34.  
  35.     var ucuncu=document.createElement('input');
  36.     ucuncu.type="text";
  37.     ucuncu.size="11";
  38.     sagteref.appendChild(ucuncu);
  39.  
  40.     }
  41.  
  42. function del(){
  43.     var cedvel=document.getElementById("tab");
  44.     var a=cedvel.rows.length;
  45.     for(i=0; i<a; i++){
  46.  
  47.         var komp=cedvel.rows[i].cells[0].childNodes[0];
  48.         if(komp.checked==true){
  49.  
  50.             cedvel.deleteRow(i);
  51.             a--;
  52.             i--;
  53.  
  54.             }
  55.         if(i>=0)
  56.         cedvel.rows[i].cells[1].childNodes[0].nodeValue=i+1
  57.         }
  58.  
  59. }
  60.  
  61. function checkall(){
  62.     var sec=document.getElementById("tab");
  63.     for(i=0; i<sec.rows.length; i++){
  64.  
  65.         sec.rows[i].cells[0].childNodes[0].checked=true;
  66.  
  67.         }
  68.  
  69.  
  70.  
  71.     }
  72.  
  73. function uncheckall(){
  74. var sec=document.getElementById("tab");
  75.     for(i=0; i<sec.rows.length; i++){
  76.  
  77.         sec.rows[i].cells[0].childNodes[0].checked=false;
  78.  
  79.         }
  80.  
  81. }
  82. var checked=1;
  83. function all(){
  84.     var sec=document.getElementById("tab");
  85.     for(i=0; i<sec.rows.length; i++){
  86.         if(checked==1){
  87.         sec.rows[i].cells[0].childNodes[0].checked=true;
  88.         checked=2;
  89.         }
  90.         if(checked==2){
  91.         sec.rows[i].cells[0].childNodes[0].checked=false;
  92.         checked=1;    
  93.  
  94.         }
  95.         }
  96.  
  97.  
  98.  
  99.     }
  100.  
  101.  
  102.  
  103.  
  104.  
  105. </script>
  106.  
  107.  
  108.  
  109.  
  110.  
  111.  
  112.  
  113. </head>
  114.  
  115. <body bgcolor="#999999">
  116. &nbsp<input type="checkbox" onclick="all()"  value="check/uncheckall" id="box"/>check/uncheck all
  117. <table  id="tab" style="font-family:'Comic Sans MS', cursive">
  118. <tr><td><input type="checkbox" /></td><td>1</td><td><input type="text" size="11" /></td></tr>
  119. </table>
  120. <input type="button" value="add" onclick="add()"  style="font-family:'Comic Sans MS', cursive"/><br />
  121. <input type="button" value="delete" onclick="del()" style="font-family:'Comic Sans MS', cursive"/>
  122. <input type="button" value="uncheckall" onclick="uncheckall()" style="font-family:'Comic Sans MS', cursive" /><br />
  123. <input type="button" value="checkall" onclick="checkall()" style="font-family:'Comic Sans MS', cursive" /><br />
  124.  
  125.  
  126. </body>
  127. </html>
Thanks in advance for attention
Feb 2 '11 #1
2 2038
RamananKalirajan
608 512MB
Hi azegurb,
I went through your code. Some small changes will make ur code work.

In HTML

Expand|Select|Wrap|Line Numbers
  1. <input type="checkbox" onclick="all1(this)"  value="check/uncheckall" id="box"/>
please change the function name and add a parameter. I doubt there is some predefined function all() in JS. Because when I tried with all() it was not working.

In JS,

Expand|Select|Wrap|Line Numbers
  1. function all1(ths){
  2.   if(ths.checked==true)
  3.      checkall();
  4.   else
  5.     uncheckall();
  6. }
Thanks and Regards
Ramanan Kalirajan
Feb 8 '11 #2
Expand|Select|Wrap|Line Numbers
  1. <input type="checkbox" name="checkall" id="checkall" onclick="check_all()">Select All
  2. <br>
  3.  
  4. <input type="checkbox" name="check_0" id="check_0">Option 1
  5. <input type="checkbox" name="check_1" id="check_1">Option 2
  6. <input type="checkbox" name="check_2" id="check_2">Option 3
  7. <input type="checkbox" name="check_3" id="check_3">Option 4
  8. <input type="checkbox" name="check_4" id="check_4">Option 5
  9. <input type="checkbox" name="check_5" id="check_5">Option 6
  10. <input type="checkbox" name="check_6" id="check_6">Option 7
  11. <input type="checkbox" name="check_7" id="check_7">Option 8
  12. <input type="checkbox" name="check_8" id="check_8">Option 9
  13. <input type="checkbox" name="check_9" id="check_9">Option 10
  14.  
  15. <br><hr>
  16.  
  17. <script type="text/javascript">
  18. function check_all()
  19. {
  20.  
  21.     for(i=0;i<10;i++)
  22.     {
  23.         tmp_checkbox_id = "check_"+i;
  24.             if(document.getElementById("checkall").checked == true)
  25.             {    
  26.                                 document.getElementById(tmp_checkbox_id).checked = true;
  27.             }
  28.             else
  29.             {    
  30.                 document.getElementById(tmp_checkbox_id).checked = false;
  31.             }
  32.  
  33.     }
  34. }
  35. </script>
May 16 '12 #3

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