JAVASCRITP checkbox Full selection of the reverse selection code

JAVASCRITP checkbox Full selection of the reverse selection code

Total selection and reverse selection

<script type= "text/web Effects" >
var Checkflag = "false";
function check (field)
{
if (Checkflag = = "false")
{
for (i = 0; i < field.length; i++)
{
field[i].checked = true;}
Checkflag = "true";
Return "Select All";
}
Else
{
for (i = 0; i < field.length; i++)
{
field[i].checked = false;
}
Checkflag = "false";
Return "Select All";
}
}
</script>
Add to
function Adddeptid (DeptID)
{
var dept_id = DeptID;
if (dept_id==0)
{
Alert ("Please select a department!") ")
Return
}
Else
{
var re=showmdialog (' emp_add.asp tutorial x?dept_id= ' +dept_id, ' 820 ', ' 670 ', ' no ');
if (re== "OK") {
Window.location.reload ();
}
}
}
Modify (Modify is to determine that checkbox can only select one to modify, and finally get the selected value to jump the page as a parameter)
function Checkboxnum (emp_id) {
CheckBox Selection
var DataList = document.getElementById ("GridView1");
var inputs = Datalist.getelementsbytagname ("input");
var checked_counts = 0;
var checkevalue = 0;
for (Var i=0;i<inputs.length;i++)
{
if (inputs[i].checked)
{
Checkevalue = Inputs[i].value;
checked_counts++; }
}
if (checked_counts>1)
{
Alert ("Only one item can be selected!") ");
}
else if (checked_counts==0)
{
Alert ("Please select a modification!") ");
}
Else
{
var re=showmdialog (' emp_add.aspx?edit_emp_id= ' +emp_id, ' 820 ', ' 670 ', ' no ');
if (re== "OK") {
Window.location.reload ();
}
}
｝
Delete (first determine the number of checkbox selections, in the form of an array to wear to another page)
function Delselectedclick (emp_id)
{
if (emp_id==0)
{
Alert ("Please select a department!") ")
Return
}
var DataList = document.getElementById ("GridView1");
var Chkarray = datalist.getelementsbytagname ("input");
var flag = false;
var checkvalue = "";
for (Var i=0;i<chkarray.length;i++)
{
if (chkarray[i].type== "checkbox")
{
if (chkarray[i].checked)
{
CheckValue + = chkarray[i].value+ ",";
Flag = true;
}
}
}
if (flag = = True)
{
if (Confirm (OK to delete selected user?))
{
Window.navigate ("user_content.aspx?delete_emp_id=" +emp_id);
return true;
}
Else
{
return false;
}
}
Else
{
Alert ("Select the user you want to delete first!") ");
return false;
}

<table>
     <tr>
           <td>
                <input id= "CheckBox1" type= "checkbox"/> Select all
                 <a href= "Javascript:adddeptid (<%=ideptid%>)" style= "Cursor:pointer" > add </a>
                <a href= "Javascript:checkboxnum (<%=ideptid%>)" style= "Cursor:pointer" > Modify </a>
                 <a href= "Javascript:delselectedclick (<%=ideptid%>)" style= "Cursor:pointer" > Delete </a>

</td>
</tr>
</table>

Core code

/**
* Click method of checkbox
Requirements
* 1. The Name property of a checkbox that is selected/not selected is +_all for the Name property name of a single checkbox, note: The last must be _all.
* For example: The name=or_id of a single checkbox, the Name=or_id_all of all selected checkbox
* 2. Select/All optional checkbox You must define the id attribute, and the id attribute value is the same as the Name property value
* 3. All individual checkbox in the same form.
* 4. All select/All optional checkbox can also be outside form in form.
* 5. The entire page does not allow the checkbox to have the same name and the same ID component as the full selection/all option.
*
*/
function _tlscheckboxselall (formobj,checkboxclicked) {
var checkname = checkboxclicked.name;//Gets the Name property of a clicked checkbox
var index = checkname.indexof ("_all");//Determine if there is a _all string
var isall = false;
if (index!=-1) {//if _all is available
if (index+ "_all". Length==checkname.length) {//Satisfy description _all is on the last side, indicating that this is a checkbox with all/no selections.
Isall = true;
}
}
var thischecked = checkboxclicked.checked;//The status of the current checkbox true= selected False= not selected
if (Isall) {//click checkbox with all/no selections
var childcheckname = checkname.substring (0,index);
Eval ("var allchildcheckboxs = formobj.") +childcheckname);
var childcheckboxcount = allchildcheckboxs.length;
if (childcheckboxcount==null) {//only 1 single checkbox
allchildcheckboxs.checked = thischecked;
}else{//has 2 or more single checkbox of more than 2
for (Var i=0;i<childcheckboxcount;i++) {
allchildcheckboxs[i].checked = thischecked;
}
}
}else{//Point a single checkbox
var parentcheckboxname = checkname+ "_all";
if (Thischecked==false) {
document.getElementById (parentcheckboxname). Checked=false;
}else{//determines whether the entire single checkbox after the current checkbox is in the true state
Eval ("var allchildcheckboxs = formobj.") +checkname);
var childcheckboxcount = allchildcheckboxs.length;
var isallchecked = true;
if (childcheckboxcount==null) {//only 1 single checkbox
if (Allchildcheckboxs.checked==false) {
isallchecked = false;
}
}else{//has 2 or more single checkbox of more than 2
for (Var i=0;i<childcheckboxcount;i++) {
if (Allchildcheckboxs[i].checked==false) {
isallchecked = false;
Break
}
}
}
if (isallchecked) {//All single checkbox is in true state
document.getElementById (parentcheckboxname). Checked=true;
}
}
}
}