Create An Onchange Within A Document.createElement?

So i'm trying to create an onchange within a createElement of a textfield and it doesnt work, this is what i'm trying:

Code:

inputEl.onchange=function(){this.value=$('ship_pueblo').innerHTML = $('stateSelect').value || '';};

My entire working code without the onchange i'm trying to pull of is:

Code:

// Create the Input Field
var inputEl = document.createElement("<INPUT TYPE='text' NAME='state'>")
inputEl.setAttribute("id", "stateSelect");
inputEl.setAttribute("type", "text");

[Code]...