function book_yz(aa){
if((aa.bt.value=='')||(aa.nr.value=='')){
alert('标题和留言内容不能为空!');
return false;}
if(aa.nr.value.length>4000){
alert('每条留言不能超过4000字!');
return false;}
if(aa.yz.value==''){
alert('匿名留言时请输入验证码!');
return false;}
}
function setYzm(){if(document.getElementById("yzmLine").innerHTML.length<16){document.getElementById("yzmLine").innerHTML = "<img src='/inc/yzm.aspx?abc=str&t=" + Math.random() + "' onclick=\"this.src=this.src+'?'\" align=absmiddle> (不区分大小写字母)"}} 
if (shuziren_in('blog_book')) {document.getElementById('blog_book').innerHTML='<div style="padding:5px;"><form name=book_form id=book_form action=/blog/login.aspx?abc=addbook&id=736 method=post onSubmit=\'javascript:return book_yz(this)\'><span style=\'color:#f60;font-weight: bold;font-size:16px;margin-bottom:5px;\'>&gt;&gt;BLOG留言板</span><br/>留言主题：<input name=bt type=text id=bt size=45 maxlength=25 value=\'\'><br/><textarea name="nr" id="nr" style="width:400px;height:100px;margin:5px 0;" onclick="this.style.height=\'150px\'"></textarea><br/>验证码：<input name=yz type=text id=yz size=4 maxlength=4 onFocus="javascript:setYzm();" style="margin-bottom:5px;"><span style="padding:5px;" id="yzmLine">匿名回复时，请点击后输入验证码</span><br/><input name=but_Submit type=submit value="提交我的留言"><input type="hidden" name=huiyuan value=\'\'></form></div>';}