<input type="checkbox" name="ChekRole" value="1" >超级管理员
<input type="checkbox" name="ChekRole" value="2">学生
<input type="checkbox" name="ChekRole" value="3">教师

<script type="text/javascript">
 var name = "1,2,3";
 var names = name.split(",");
 var inputs = document.getElementsByTagName('input');
	
	 for (var i =0;i<inputs.length;i++) {
 for (var n =0;n<names.length;n++) {
  if (names[n]===inputs[i].value) {
  inputs[i].checked = true;
  }
 }
 } 
</script>

<script type="text/javascript">
var name = "1,2";
$(name.split(",")).each(function (i,e){
 $("input[name='ChekRole'][value='"+e+"']").prop("checked",true);
})
</script>

<input type="checkbox" id="test1" name="ChekRole" value="1" >超级管理员
<input type="checkbox" id="test2" name="ChekRole" value="2">学生
<input type="checkbox" id="test3" name="ChekRole" value="3">教师

<script type="text/javascript">
document.oncontextmenu = function(){return false;}
 var name = "test1,test2"
 var names = name.split(",")
 var inputs = document.getElementsByTagName('input')
	 for (var i =0;i<inputs.length;i++) {
 for (var n =0;n<names.length;n++) {
  if (names[n]===inputs[i].id) {
  inputs[i].checked = true;
  }
 }
 }
</script>

<script type="text/javascript">
var name = "test1,test2";
$(name.split(",")).each(function (i,e){
 $("input[name='ChekRole'][id='"+e+"']").prop("checked",true);
})
</script>

//初始化默认已拥有的权限
$(function () {
 /*  获取所有复选框的值   
 var box = document.getElementsByName("user-Character-0-0-0");
 var objArray = box.length;
 var chestr="";

 for(var i=0;i<objArray;i++){
  chestr+=box[i].value+",";
 }
 alert(chestr);*/

 var roleName = $("#roleName").val();//获取需要初始化的数值
 //把已经拥有的复选框的属性值变成true
 var arrStr = roleName.split(",");//转化成数组
 for (var i = 0; i < arrStr.length; i++) {
 $("input[Value=" + arrStr[i] + "]").attr("checked", "checked");//根据value给checkbox设置默认值（勾选）
 }
});