search_url = 'http://www.aiwenwen.com/Search.asp?sp=';
	ask_url = 'http://www.aiwenwen.com/AskQuestion.asp?sp=';
function trim(content)
{
	content = content.replace(/(^\s*)|(\s*$)/g, "");
	return content;
}

function isEmpty(s)
{
	return (s==null)||(s.length==0);
}

function searchAnswer(questionTitle)
{		
	var title = trim(questionTitle.value);
	if(isEmpty(title))
	{
		alert('请输入【问题标题】的内容。');
		questionTitle.select();
		return false;
	}
	return true;
}
function checkKey(questionTitle, ev)
{
	if(ev.keyCode==13)
	{
		if(searchAnswer(questionTitle))
			window.open(search_url + questionTitle.value);
		return false;
	}
	return true;
}
function redirectSearch(questionTitle, isSrch)
{
	if(isSrch)
	{
		if(searchAnswer(questionTitle))
			window.open(search_url + questionTitle.value);
		return false;
	}
	else window.open(ask_url + questionTitle.value);
}