/**
 * create date: 2009-12-15
 * @requires jQuery v1.3+
 */
$(function(){
	$(".prev,.next", "#carousel").click(function(e){
		e.preventDefault();
	});
	
	$("#form_test").submit(function(){
		if ($("input:checked", this).size() == 0) {
			alert("请完成答题。");
			return false;
		}
	});
});

/**
 * 复制文本到系统剪贴板
 * @param {Object} txt: 需要复制的文本
 */
function copyToClipboard(txt){
	if (window.clipboardData) {
		window.clipboardData.clearData();
		window.clipboardData.setData("Text", txt);
		alert("复制成功！");
	} else if (navigator.userAgent.indexOf("Opera") != -1) {
		window.location = txt;
	} else if (window.netscape) {
		try {
			netscape.security.PrivilegeManager.enablePrivilege("UniversalXPConnect");
		} catch (e) {
			alert("被浏览器拒绝！\n请在浏览器地址栏输入'about:config'并回车\n然后将'signed.applets.codebase_principal_support'设置为'true'");
		}
		var clip = Components.classes['@mozilla.org/widget/clipboard;1'].createInstance(Components.interfaces.nsIClipboard);
		if (!clip) 
			return;
		var trans = Components.classes['@mozilla.org/widget/transferable;1'].createInstance(Components.interfaces.nsITransferable);
		if (!trans) 
			return;
		trans.addDataFlavor('text/unicode');
		var str = new Object();
		var len = new Object();
		var str = Components.classes["@mozilla.org/supports-string;1"].createInstance(Components.interfaces.nsISupportsString);
		var copytext = txt;
		str.data = copytext;
		trans.setTransferData("text/unicode", str, copytext.length * 2);
		var clipid = Components.interfaces.nsIClipboard;
		if (!clip) 
			return false;
		clip.setData(trans, null, clipid.kGlobalClipboard);
		alert("复制成功！");
	}
}