/**

* js模拟form表单提交

* @param {object} 参数对象

*    url       必填  提交地址

*    methond   选填  默认post  提交方式  post  get

*    target    选填  默认_self  当前页面还是新页面   _self _blank

*              其它参数

*/

function jsFormSubmit(params) {

  var turnForm = document.createElement("form");

  //一定要加入到body中！！

  document.body.appendChild(turnForm);

      var method = params['methond'] || "POST";	//默认为post

  turnForm.method = method;

  delete params['methond'];

  var target = params['target'] || "_self";	//默认为当前页面

  turnForm.target = target;

  delete params['target'];

  var url = params.url; //提交地址

  turnForm.action = url;

  delete params['url'];

  //创建隐藏表单

  for(var item in params){

    var newElement = document.createElement("input");

    newElement.setAttribute("type","hidden");

    newElement.setAttribute("name",item);

    newElement.setAttribute("value",params[item]);

    turnForm.appendChild(newElement);

  }

  turnForm.submit();

}

var params = {

    //必填参数

    "url":url,

    "methond":"post",

    "target":"_blank",

    //下边为要提交的数据

    "j_username":"SYNKMXS0000000043",

    "j_password":"3258"

}

formSubmit(params);

/**

* js模拟a点击

* @param {string}  url       必填  提交地址

* @param {string}  target    选填  默认_self  当前页面还是新页面   _self _blank

*/

function jsALink(url,target) {

  var target = target || "_blank";

  //先读取alink 不存在则创建

  var alink = document.getElementById("alink");

  if(alink==undefined)  alink=document.createElement("a");

  //赋值

  alink.id = "alink";

  alink.href = url;

  alink.target = target;

  alink.style = "display: none;";

  //写入页面

  document.body.appendChild(alink);

  //执行点击事件

  document.getElementById("alink").click();

}

jsALink("http://www.jsfun.cn","_blank");