function addEvent(elm, evType, fn, useCapture)
{
//Credit: Function written by Scott Andrews
//(slightly modified)

var ret = 0;

if (elm.addEventListener)
ret = elm.addEventListener(evType, fn, useCapture);
else if (elm.attachEvent)
ret = elm.attachEvent('on' + evType, fn);
else
elm['on' + evType] = fn;

return ret;
}