Let the check box select only one method _javascript tips

JS in:

Copy Code code as follows:

function Chooseone (CHK) {
First gets the collection object of the Chekcbox of the same name
var obj = document.getelementsbyname ("chk");
For (i=0 i<obj.length; i++) {
To determine if the I element in the Obj collection is CB, if it does not indicate that it has not been selected
if (obj[i]!=chk) obj[i].checked = false;
To make at least one tick, take off the line above and swap it with the line below.
else obj[i].checked = true;
}
}

JSP page:

Copy Code code as follows:

<input type= "checkbox" Id= "${usergroup.groupid}" Name= "Chk" onclick= "Chooseone" (This) >