javascript implements the full selection unselection and assignment of checkBox

When we are doing projects at ordinary times, we often encounter situations in which we need to realize the full selection, inverse selection and assignment of checkBox. There are also many examples on the Internet. Here I share with you my common methods and recommend them to you.

//js  Whether the value is in the array 

Array.prototype.in_array = function(e){

　　for(i=0;i<this.length;i++){

　　　　if(this[i] == e)

　　　　　　return true;

　　}

　　return false;

}

//js An array of index

Array.prototype.find_str=function(string){

　　var str = this.join("");

　　return str.indexOf(string);

}

var houseIds=new Array();

$("#chebox-list-all").click(function(){

　　if($("#chebox-list-all").attr("checked")){

　　　　$("[name='checkboxes']").attr("checked",'true');// Future generations   increase id

　　　　var ids = document.getElementsByName('checkboxes');

　　　　var value = new Array();

　　　　for(var i = 0; i < ids.length; i++){

　　　　　　if(ids[i].checked)

　　　　　　houseIds.push(ids[i].value);

　　　　}

　　alert(houseIds);

　　}else{

　　　　$("[name='checkboxes']").removeAttr("checked");// The selected   delete Ids

　　　　houseIds=[];

　　　　alert(houseIds);

　　}

})

// Radio increase id

function check(obj){

　　if(!houseIds.in_array(obj.value)){

　　　　houseIds.push(obj.value);

　　　　alert(houseIds);

　　}else{

　　　　var index=houseIds.find_str(obj.value);

　　　　houseIds.splice(index, 1)

　　　　alert(houseIds);

　　}

}

That's all the code for this example, and I hope it will help you learn how to control checkbox using javascript.