原生js模拟表单提交

postcall( '/index.php', {
  UserName: 'UserName',
});

function postcall( url, params, target){
    var tempform = document.createElement("form");
    tempform.action = url;
    tempform.method = "post";
    tempform.style.display="none"
    if(target) {
        tempform.target = target;
    }
    for (var x in params) {
        var opt = document.createElement("input");
        opt.name = x;
        opt.value = params[x];
        tempform.appendChild(opt);
    }
    var opt = document.createElement("input");
    opt.type = "submit";
    tempform.appendChild(opt);
    document.body.appendChild(tempform);
    tempform.submit();
    document.body.removeChild(tempform);
}