var comment={
formHtmlS:'<form id="formcomment" name="formcomment" method="post" action="comment_submit.php" onsubmit="return comment.check();">',
formHtmlE:'</form>',
formHtmlText:'<textarea name="textarea" id="textarea" cols="45" rows="8" ></textarea>',formHtmlxuser:'<input type="hidden" name="xuser" id="xuser" value="">',
formHtmlTid:'<input type="hidden" name="tid" id="tid" value="1713">',
formHtmlSid:'<input type="hidden" name="sid" id="sid" value="0">',
formHtmlbutton:'<input type="submit" name="button" id="button" value="提交留言"/>',
	initStr:function(){
		var str=this.formHtmlS+this.formHtmlText+'<br><br>'+this.formHtmlbutton+this.formHtmlTid+this.formHtmlSid+this.formHtmlE;
		return str;
		
	},
	check:function(){
		alert('请你先登录！');return false;		if(getobj('textarea').value==''){
			alert('请输入内容！');
			getobj('textarea').focus();
			return false;
		}else{
        	return true;
        };
		
	},
    init:function(){
    document.write(this.initStr());
    }
};

function getobj(id){
	return document.getElementById(id);
}
comment.init();