function chg_pcate(){
	var xmlhttp = createHttpRequest();
	var _arr = new Array(); 
	var p_cateid = $$('p_cateid').value;
	xmlhttp.open("get","/product/proc.php?p_cateid="+p_cateid+"&act=chg_pcate",false);
	xmlhttp.onreadystatechange = function(){
		if(xmlhttp.readyState == 4){
			if(xmlhttp.status == 200){
				//alert(xmlhttp.responseText);
				$$('p_subcateid').length=0;
				var _s = unescape(xmlhttp.responseText);
				_arr = _s.split(',');
				for(var i=0;i<_arr.length-1;i+=2){
					with($$('p_subcateid')){
						options[options.length] = new Option(_arr[i+1],_arr[i]);
					}
				}
			}else{
				alert("ERROR,no status");
			}
		}
	}
	xmlhttp.send(null);
}
function focus_word(o){
	if(o.word.value.strtrim().length <2){
		o.word.focus();	
		return false;
	}
}
function proc_msg(){
	var xmlhttp = createHttpRequest();
	var content = $$('content').value.strtrim();
	var to_uid = $$('to_uid').value;
	var pro_id = $$('pro_id').value;
	var url = "to_uid="+to_uid+"&pro_id="+pro_id+"&content="+content+"&act=proc_msg";
	$$('e_content').innerHTML = "正在提交...";
	xmlhttp.open("post","/product/proc.php",true);
	xmlhttp.onreadystatechange = function(){
		if(xmlhttp.readyState == 4){
			if(xmlhttp.status == 200){
				if(xmlhttp.responseText == "true"){
					alert("留言发送成功。");
					$$('e_content').innerHTML = "留言发送成功。";
					$$('e_content').className = "c_green";
				}else{
					$$('e_content').innerHTML = xmlhttp.responseText;
					$$('e_content').className = "c_red";
				}
			}
		}
	}
	xmlhttp.setRequestHeader('Content-type','application/x-www-form-urlencoded');
	xmlhttp.send(url);
}
function submit_msg(o){
	var cansub = true;
	var content = o.content;
	if(content.value.strtrim().length <6 || content.value.strtrim().length >600){
		$$('e_content').innerHTML = "请输入留言内容，长度在6-600字符内。";
		$$('e_content').className = "c_red";
		cansub = false;
		content.focus();
	}else{
		$$('e_content').innerHTML = "";
		$$('e_content').className = "";
	}
	
	if(cansub){
		o.s1.disabled = true;
		proc_msg();
		return true;
	}else{
		return false;
	}
}

function chk_post(o){
	var cansub = true;
	var description = o.description;
	if(description.value.strtrim().length <6 || description.value.strtrim().length>2000){
		$$('e_desc').innerHTML = "请输入物品描述，长度在6-2000字符内。";
		$$('e_desc').className = "c_red";
		cansub = false;
		description.focus();
	}else{
		$$('e_desc').innerHTML = "";
		$$('e_desc').className = "";
	}
	
	var area = o.area;
	if(area.value.strtrim().length <2 || area.value.strtrim().length >50){
		$$('e_area').innerHTML = "请输入物品所在地，长度为2-50字符。";
		$$('e_area').className = "c_red";
		cansub = false;
		area.focus();
	}else{
		$$('e_area').innerHTML = "";
		$$('e_area').className = "";
	}
	
	var want = o.want_to_what;
	if(want.value.strtrim().length <2 || want.value.strtrim().length >50){
		$$('e_want').innerHTML = "请输入想要换/找的物品，长度为2-50字符。";
		$$('e_want').className = "c_red";
		cansub = false;
		want.focus();
	}else{
		$$('e_want').innerHTML = "";
		$$('e_want').className = "";
	}
	
	var title = o.title;
	if(title.value.strtrim().length <2 || title.value.strtrim().length >80){
		$$('e_title').innerHTML = "请输入信息标题，长度在2-80字符内。";
		$$('e_title').className = "c_red";
		cansub = false;
		title.focus();
	}else{
		$$('e_title').innerHTML = "";
		$$('e_title').className = "";
	}
	
	var p_cateid = o.p_cateid;
	var p_subcateid = o.p_subcateid;
	if(p_cateid.value ==0 || p_subcateid ==0){
		$$('e_cate').innerHTML = "请选择物品所属的类别。";
		$$('e_cate').className = "c_red";
		cansub = false;
		p_cateid.focus();
	}else{
		$$('e_cate').innerHTML = "";
		$$('e_cate').className = "";
	}
	
	if(cansub){
		o.s1.disabled = true;
		return true;
	}else{
		return false;
	}
}