Sample code for traversing element attributes within a DOM object_javascript skills

Directly enter the code:

For example, to get all the attributes of a button with the id "btn"

Copy the code The code is as follows:

function showBtn()
{
var tmp="";
var objBtn = document.getElementById("btn");
for(var i in objBtn)
{
tmp = i ":" objBtn[i];
}
alert(tmp);
}