how to check all checkboxed by cliking single button

[suganya vijaykumar]

i am new to jsp and servlets... i created a page that having a table having the details of employee and i put check box and edit button for every row. i gave the checkbox name same as the employeeid for deleting operation. the code like
String ch="check"
ch=ch.concat(String(valueOf(<%=rs.getString(1)%> ));
<input type="checkbox" name=<%=ch%> value==<%=ch%> >

when i click the delete button i called the servlet for delete operation, the selected rows are deleted perfectly.. but i need one more option like "check all" when i click this buttom all the rows should checked.. how to do this.. help me

[Eric Pascarello]

Basic code to check/uncheck all checkoxes in a page that contains one form

function checkAll(isChecked){
 
  var elems = document.forms[0].elements;
  var elemCount = elems.length;
  for(var i=0;i<elemCount;i++){
    if(elems[i].type=="checkbox"){
      elems[i].checked=isChecked;
    }
  }
 
}

Eric