js如何创建一个p标签,并设置内容为helloWorld

function click_label(object)
{
var div_object = document.getElementById("div_id");
if(!div_object)
{
div_object.createElement('p');
//?这边如何设置它的标签内容为"HelloWorld"

    }
}

//?这边如何设置它的标签内容为"HelloWorld"

createElement是document的方法

 <script>
function click_label(object)
{
var div_object = document.getElementById("div_id");
if(!div_object)
{
div_object=document.createElement('p');
div_object.id='div_id'
div_object.innerHTML="HelloWorld";
document.body.appendChild(div_object)
    }
}
window.onload=click_label
</script>

var p_Obj=document.createElement("p");
p_Obj.id="p_Id";
p_Obj.innerHTML="Hello World!";
window.body.appendChild(p_Obj);

用jquery最简单

 $("div_id").append("<p>Hello world!</p>");