// JavaScript Document
function guestbookAdd() 
{
	var g_person=document.getElementById("g_person").value;	
	var g_tel=document.getElementById("g_tel").value;	
	var g_fax=document.getElementById("g_fax").value;	
	var g_address=document.getElementById("g_address").value;	
	var g_postcode=document.getElementById("g_postcode").value;	
	var g_email=document.getElementById("g_email").value;	
	var g_title=document.getElementById("g_title").value;	
	var g_content=document.getElementById("g_content").value;		
	
	if(g_content=='' || g_person=='')
	{
		alert("姓名或内容不能为空!");
		return false;
	}	  		
	var url='?ajaxrequest=ok&r='+Math.random();  
	var Parameters="g_person="+escape(g_person)+"&g_tel="+escape(g_tel)+"&g_fax="+escape(g_fax)+"&g_address="+escape(g_address)+"&g_postcode="+escape(g_postcode)+"&g_email="+escape(g_email)+"&g_title="+escape(g_title)+"&g_content="+escape(g_content); 
	var myajax=createAjax(); 
	myajax.open('post',url,true); 
	myajax.onreadystatechange=function()
	{  
		if (myajax.readyState==4 && myajax.status==200) {alert('添加成功');location.href='Guestbook.asp';}
		else{}
	}
	myajax.setRequestHeader("content-type","application/x-www-form-urlencoded");//post方法时注意设置这个头
	myajax.send(Parameters); 	
}

function checkMaxInput(form) 
{	
	var maxLen = 255; 
	if (form.g_content.value.length > maxLen) 
		form.g_content.value = form.g_content.value.substring(0, maxLen);
	else
		form.remLen.value = maxLen - form.g_content.value.length;
}