js去除重复字符串内容实例

function checkre(checkid) { 
 var id = window.parent.getqry("ctrid") + "_"; 
 
 var values = window.parent.opener.document.getelementbyid(id + "txt_dept_name").value; 
 var keys = window.parent.opener.document.getelementbyid(id + "hf_ids").value; 
 
 var ary = checkid.value.split("|"); 
 var newsvalues = ary[0]; 
 var newskeys = ary[1]; 
 
 if (checkid.checked) { 
     values = values + "," + newsvalues; 
     keys = keys + "," + newskeys; 
 } 
 else { 
     values = values.replace(new regexp("," + newsvalues), ""); 
     keys = values.replace(new regexp("," + newskeys), ""); 
 } 
 
 values = okd(values); 
 keys = okd(keys);  
 window.parent.opener.document.getelementbyid(id + "txt_dept_name").value = values; 
 window.parent.opener.document.getelementbyid(id + "hf_ids").value = keys; 
 
 return; 
} 
//转换成数组，去掉重复，再组合好。 
function okd(str) { 
 
 var ary = str.split(","); 
 // 去重的算法 
 var json = {}; 
 for (var i = 0; i < ary.length; i++) { 
    if (ary[i] != "") { 
       json["a" + ary[i]] = ary[i]; 
     } 
 }  // www.jb200.com
 
 // 查看结果 
 var str2 = ""; 
 for (var key in json) { 
     str2 += "," + json[key]; 
 } 
 
 var s = str2.tostring(); 
 
/去掉第一个逗号 
 if (s.substr(0, 1) == ',') { 
     s = s.substr(1); 
 }
 return s; 
} 
function add_all() { 
 var ck = document.getelementsbytagname("input"); 
 for (i = 0; i < ck.length; i++) { 
     if (ck[i].type == "checkbox") { 
         ck[i].checked = true; 
         checkre(ck[i]); 
       } 
 } 
 } 
 
function del_all() { 
 var id = window.parent.getqry("ctrid") + "_"; 
 window.parent.opener.document.getelementbyid(id + "txt_dept_name").value = ""; 
 window.parent.opener.document.getelementbyid(id + "hf_ids").value = ""; 
 
 var ck = document.getelementsbytagname("input"); 
 for (i = 0; i < ck.length; i++) { 
     if (ck[i].type == "checkbox") { 
         ck[i].checked = false; 
     } 
 } 
} 

<input id='chk_pkid' type='checkbox' name='chk' onclick='checkre(this);' value='值|pkid' />