function tabit(btn){var idname = new String(btn.id);var s = idname.indexOf("_");var e = idname.lastIndexOf("_")+1;var tabName = idname.substr(0, s);var id = parseInt(idname.substr(e, 1));var tabNumber = btn.parentNode.childNodes.length;for(i=0;i<tabNumber;i++){document.getElementById(tabName+"_div_"+i).style.display = "none";document.getElementById(tabName+"_btn_"+i).style.backgroundImage = "url(images/tit_1.jpg)";document.getElementById(tabName+"_btn_"+i).style.borderBottomColor = "";document.getElementById(tabName+"_btn_"+i).className = "wrods4";};document.getElementById(tabName+"_div_"+id).style.display = "block";btn.style.backgroundImage = "url(images/tit_2.jpg)";btn.style.borderBottomColor = "";btn.className = "wrods2";}
function checkForm(form){
	if(form.msg.value.length>1000){
		alert("评论不能超过1000个字");
		form.msg.focus();
		return false;
	}else if(form.msg.value==null||form.msg.value.trim()==""){
		alert("不能发送空消息");
		form.msg.focus();
		return false;
	}
}