How to use js to achieve all selection and none selection_javascript skills

js:

复制代码 代码如下:

function checkAll(name) {
var el = document.getElementsByTagName('input');
var len = el.length;
for(var i=0; iif((el[i].type=="checkbox") && (el[i].name==name)){
el[i].checked = true;
}
}
}
function clearAll(name) {
var el = document.getElementsByTagName('input');
var len = el.length;
for(var i=0; iif((el[i].type=="checkbox") && (el[i].name==name)){
el[i].checked = false;
}
}

}

html:

复制代码 代码如下:

全选