I have a large project in which I need to intercept assignments to things like element.src, element.href, element.style, etc. I figured out to do this with defineSetter, but it is behaving very strangely (using Chrome 8.0.552.231)

An example:

var attribs = ["href", "src", "background", "action", "onblur", "style", "onchange", "onclick", "ondblclick", "onerror", "onfocus", "onkeydown", "onkeypress", "onkeyup", "onmousedown", "onmousemove", "onmouseover", "onmouseup", "onresize", "onselect", "onunload"];
for(a = 0; a < attribs.length; a++) {
  var attrib_name = attribs[a];
  var func = new Function("attrib_value", "this.setAttribute(\"" + attrib_name + "\", attrib_value.toUpperCase());");
  HTMLElement.prototype.__defineSetter__(attrib_name, func);
}

What this code should do is whenever common element attribute in attribs is assigned, it uses setAttribute() to set a uppercased version of that attribute.

For some very strange reason, the setter works for only ~1/3 of the assignments.

For example with

element.src = "test"

the new src is "TEST", like it should be

however with

element.href = "test"

the new href is "test", not uppercase

then even when I try element.__lookupSetter__("href"), it returns the proper, uppercasing setter

the strangest thing is different variables are intercepted properly between Chrome and Firefox

help!!