function G_createXMLHttp() 
{ 
	if (window.ActiveXObject) 
	{ 
		xmlHttp = new ActiveXObject("Microsoft.XMLHTTP"); 
	} 
	else if (window.XMLHttpRequest) 
	{ 
		xmlHttp = new XMLHttpRequest; 
	} 
} 
var py_name,num1,sum,lb_name;
function G_change(Cid,lb_name,py,num,summ){   //Cid关联id,lb_name区域名，py显示位ID，num下级类，summ总级数;
   var bid;
    bid=Cid;
	lb_name=lb_name;
	py=py;
	py_name=py;
	num1=num;
	sum=summ;
	//alert(num);
	G_createXMLHttp(); 
	//G_show('"+py_name+"');
	xmlHttp.onreadystatechange = G_show; 
	var url = "../inc/py.asp?bid="+escape(bid)+"&lb_name="+escape(lb_name)+"&py="+escape(py)+"&s="+escape(num)+"&summ="+escape(summ);
	xmlHttp.open("GET",url,true); 
	xmlHttp.send(null); 
} 
function G_show() 
{ 
	 if(xmlHttp.readyState ==4){   
        if(xmlHttp.status ==200){   
		  py_name1=py_name+num1 ;
		  document.getElementById(py_name1).innerHTML = xmlHttp.responseText; 
		   for( i=num1+1;i<=sum;i++){
		   ss=py_name+i;
		   //alert(ss);
		   document.getElementById(ss).innerHTML = "<select name='"+lb_name+i+"' class='menu_with_100px' id='"+lb_name+i+"' style='border:#CCCCCC'><option value=''>请选择...</option></select>"; 
		    }
        }else{   
         // alert("不能得到描述信息:" + xmlHttp.statusText);   
        }   
      }   
}
function limitNum(obj) {
    if(obj.value.replace(/[\d+]/ig,"").length>0) {
        alert('请输入数字');
		obj.value="";
    }
}