function getCookie(c_name)
{
if (document.cookie.length>0)
  {
  c_start=document.cookie.indexOf(c_name + "=")
  if (c_start!=-1)
    { 
    c_start=c_start + c_name.length+1 
    c_end=document.cookie.indexOf(";",c_start)
    if (c_end==-1) c_end=document.cookie.length
    return unescape(document.cookie.substring(c_start,c_end))
    } 
  }
return ""
}
/*
function docok(){
	var refpage=getCookie('refpage')
	document.getElementById("refpage").value=refpage;
}
*/
function setCookie(c_name,value,expiredays){
	var exdate=new Date()
	exdate.setDate(exdate.getDate()+expiredays)
	document.cookie=c_name+ "=" +escape(value)+
	((expiredays==null) ? "" : ";expires="+exdate.toGMTString())
}

function checkCookie()
{

refpage=getCookie('refpage')

if (refpage == null || refpage == "")
  {
  refpage=top.document.referrer;
  if (refpage!=null && refpage!="")
    {
		setCookie('refpage',refpage,365)
		//document.getElementById("refpage").value=refpage;
    }else{
		setCookie('refpage',"The unknown origin",365)
	}
  }
}
checkCookie();

function ltrim(str) //去左空格
{ 
var _str = " "+str; 
var re = /[ ]+([\w|\W]*)/gi; 
_str.match(re); 
return RegExp.$1; 
}

function checkadd(){
	if( ltrim(document.myform.name.value) =="") {
	alert("请填写姓名");
	document.myform.name.focus();
	return false;
	}
	if( ltrim(document.myform.tel.value) =="") {
		alert("请填写电话");
		document.myform.tel.focus();
		return false;
	}else{
		 if(isNumber(document.myform.tel.value)==false){
			alert("电话号码不正确");
			return false;
		 }
	}
	if( ltrim(document.myform.addr.value) =="") {
	alert("请填写地址");
	document.myform.addr.focus();
	return false;
	}
	var refpage=getCookie('refpage')
	document.myform.refpage.value=refpage;
	return true;

}







function    isNumber(String){  
	var Letters = "1234567890- "; //可以自己增加可输入值
	var i;
	var c;
	if(String.charAt( 0 )=='-')
		return false;
	if( String.charAt( String.length - 1 ) == '-' )
	return false;
	for( i = 0; i < String.length; i ++ )
	{  
	c = String.charAt( i );
	if (Letters.indexOf( c ) < 0)
	return false;
	}
	return true;
	}
	function CheckForm()
	{  
	if(!isNumber(document.form.TEL.value)) { 
	return false;
	}
	return true;
}
















function CharCheck(RegExpStr){
	var InputChar = String.fromCharCode(event.keyCode);
	if(RegExpStr.test(InputChar))
	{
		return true;
	}
	else
	{
		return false;
	}
}
function getQueryString(name){
    if(location.href.indexOf("?")==-1 || location.href.indexOf(name+'=')==-1){
        return '';
    }
    var queryString = location.href.substring(location.href.indexOf("?")+1);
    var parameters = queryString.split("&");
    var pos, paraName, paraValue;
    for(var i=0; i<parameters.length; i++){
        pos = parameters[i].indexOf('=');
        if(pos == -1) { continue; }
        paraName = parameters[i].substring(0, pos);
        paraValue = parameters[i].substring(pos + 1);
        if(paraName == name){
            return unescape(paraValue.replace(/\+/g, " "));
        }
    }
    return '';
}