checkbox 多选框 联动实现代码_表单特效

web前端|js教程

checkbox,多选框,联动

web前端-js教程

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实现代码

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function CheckboxGroup(){

var arrelement = document.all;

var i=0;

while(ivar forgroupattrib = arrelement[i].getAttribute(forcheckboxgroup);

if(forgroupattrib != null && forgroupattrib != \){

arrelement[i].setAttribute(groupmember,_getGroupMember(arrelement[i]));

if(arrelement[i].tagName.toLowerCase() == input && arrelement[i].type == checkbox){

arrelement[i].onclick=function(){

//----------------------Checked All------------------

var groupmember = this.getAttribute(groupmember);

var i = 0;

while(i<groupmember.length){

groupmember[i].checked = this.checked;

i++;

}

//---------------------------------------------------

}

}

_setState(arrelement[i]);

}

i++;

}

}

function _getGroupMember(o){

var groupname = o.getAttribute(forcheckboxgroup);

var items = new Array;

var inputs = document.getElementsByTagName(input);

var i=0;

while(i<inputs.length){

if(inputs[i].type == checkbox){

var groupattrib = inputs[i].getAttribute(group);

if(groupattrib == groupname){

items[items.length] = inputs[i];

var master = inputs[i].getAttribute(groupmaster);

if (master == null) {

master = new Array;

master[0] = o.uniqueID;

inputs[i].setAttribute(groupmaster, master);

}

else{

master[master.length] = o.uniqueID;

}

inputs[i].onpropertychange = function(){

if (event.propertyName == checked) {

var arro = this.getAttribute(groupmaster);

var i = 0;

while (i < arro.length) {

_setState(document.getElementById(arro[i]));

i++;

}

}

}

}

}

i++;

}

return items;

}

function _setState(o){

var master = o;

if(master!=null){

var chkselall = true;

var chknosel = true;

var groupmember = master.getAttribute(groupmember);

var i = 0;

while(i<groupmember.length){

if(chkselall)chkselall = groupmember[i].checked;

if(chknosel)chknosel = !groupmember[i].checked;

i++;

}

if(master.tagName.toLowerCase() == input&&master.type==checkbox){

if (chkselall) {

master.indeterminate = false;

master.checked = true;

}

if (chknosel) {

master.indeterminate = false;

master.checked = false;

}

if(!chkselall&&!chknosel)master.indeterminate = true;

}

else{

master.disabled = chknosel;

}

}

}

window.attachEvent(onload,CheckboxGroup);