Javascript & Jquery 遍历Json

/*
author: liulf
function:
    var __db_cpcj=vCpcj;
    var __db_cp=vCp;
    var vCp={"cppage":[
    {"cpdh":"A01000101","page":"1","ca":"1309-36-0","mc":"硫铁矿","ename":"Pyrite","bm":"黄铁矿"},
    {"cpdh":"A01000201","page":"1","ca":"1309-36-0","mc":"硫精砂","ename":"Pyrite concentrate;Sulfur concentrate","bm":""},
    {"cpdh":"A01000202","page":"1","ca":"1309-36-0","mc":"硫精矿粉","ename":
    "Powdered pyrite concentrate;Pyrites concentrate,powder;Sulfur concentrate,powder","bm":"硫精矿"},
    {"cpdh":"A02000101","page":"1","ca":"","mc":"磷矿石","ename":"Phosphorus ore","bm":""},
    {"cpdh":"A02000111","page":"2","ca":"","mc":"磷矿砂","ename":"Phosphorite grit","bm":""},
    {"cpdh":"A02000201","page":"2","ca":"","mc":"磷矿粉","ename":"Phosphate rock powder","bm":""},
    {"cpdh":"A03000101","page":"2","ca":"12447-04-0","mc":"硼矿石","ename":"Ascharite;Boric ore","bm":"硼镁矿"},
    {"cpdh":"A04000101","page":"2","ca":"","mc":"钾长石","ename":"Potash feldspar;Potassium feldspars","bm":""},
    {"cpdh":"A04000201","page":"2","ca":"12003-63-3","mc":"长石粉","ename":"Feldspar powder","bm":""},
    {"cpdh":"A04000301","page":"2","ca":"","mc":"光卤石","ename":"Carnallite","bm":""}
    ]}
*/
function ObjSearch()
{   
    this.kw = '';
    this.searchCpcj= function()
    {       
        $(vCpcj).each(function(){
           
        });
    }
    this.searchCp = function()
    {
//        var json = eval(vCp.cppage)
//        for(var i=0; i<json.length; i++)
//        {
//            alert(json[i].cpdh+" " + json[i].page)
//            break;
//        }
          $.each(vCp.cppage,function(index,content){
            document.write('<div>'+content.cpdh+'</div><br />');
          }); 
    }
}

--------------------------------------------js---------------------------------

如何遍历jsonc对象？其实方法很简单。

比如有如下json对象：

var obj ={”name”:”冯娟”,”password”:”123456″,”department”:”技术部”,”sex”:”女”,”old”:30};

遍历方法：

for(var p in obj)

{

str = str+obj[p]+’,';
return str;

}