Checkbox全选、取消全选、反选

JS

window.onload = function(){
	var targets = document.getElementsByName("actionSelects"),
			targetsLen = targets.length,
			i = 0;

	document.getElementById("allSelect").onclick = function(){
		for(i = 0 ;i < targetsLen ; i ++){
			targets[i].checked = true;
		}
	}

	document.getElementById("canelallSelect").onclick = function(){
		for(i = 0 ;i < targetsLen ; i ++){
			targets[i].checked = false;
		}
	}

	document.getElementById("_select").onclick = function(){
		for(i = 0 ; i < targetsLen ; i ++){
			targets[i].checked = !targets[i].checked;
		}

	}
};