移动端调试使用日志定位

window.onload = function(){
	onerror=handleErr11111111;
	var txt="";
	function handleErr11111111(msg,url,l){
		txt="本页中存在错误。\n\n"
		txt+="错误：" + msg + "\n"
		// txt+="URL: " + url + "\n"
		txt+="行：" + l + "\n\n"
		txt+="点击“确定”继续。\n\n"
		alert(txt)
		return true
	}
	// f243
	var box = documnt.getElementByd('boxx');
	alert(box)
}