常用JS模板

var _win, _doc, _stt, _do = document.domain, _arr = _do.split(".");
function _st() {
	try {
		document.domain = _arr.join(".");
		_arr.shift();
	}catch(e){
		document.domain = _do;
		_arr = _do.split(".");
		_arr.shift();
	}
	if(document.frames) {
		_doc = document.frames["ifrmain"].document;
		_win = document.frames["ifrmain"].window;
	}else{
		_doc = document.getElementById("ifrmain").contentDocument;
		_win = document.getElementById("ifrmain").contentWindow;
	}
	if(_doc && _win && _win.location.href != "about:blank" && (_doc.readyState == "interactive" || _doc.readyState == "complete")) {
		if(_stt) clearTimeout(_stt);
		//do some init
	}else{
		_stt = setTimeout(_st, 500);
	}
}