js设置文本的属性为只读

Question

document.getElementById("my_id").setAttribute("readonly", "readonly"); 
这个在ie6下可以，在ie8下为什么不可以呢。

Answer 1

<script type="text/javascript"> 
function a(){ 
document.getElementById("my_id").removeAttribute("readOnly"); 
} 
function b(){ 
document.getElementById("my_id").setAttribute("readOnly","true"); 
} 
</script> 
JQUERY$("#my_id").attr("readonly":"readonly");
$("#my_id").removeAttr("readonly"); 

Answer 2

$("#my_id").attr("readonly":"readonly");
$("#my_id").removeAttr("readonly"); 

Answer 3

  是这样滴吧  $("#my_id").attr("readonly","readonly");

Answer 4

$("#my_id").attr("readonly":"readonly");
$("#my_id").removeAttr("readonly"); 

Answer 5

$("#my_id").attr("readonly"，"readonly");
$("#my_id").removeAttr("readonly");attr("readonly", "true");
attr("readonly", "");试了，都可以

Answer 6

function b(){  
document.getElementById("my_id").setAttribute("readOnly","true");  
}