// JavaScript Document

 function Trim(w_st)
  {
    v_st=""
    
    for(i=0;i<w_st.length;i++)
     {
       if (w_st.charAt(i)!=" ")
        v_st=v_st+w_st.charAt(i) 
      }
      
   return(v_st)
  } 


function changurl(message,url)
{
  alert(message);
  location.href=url;
}






function del_space(s)
{
	for(i=0;i<s.length;++i)
	{
	 if(s.charAt(i)!=" ")
		break;
	}

	for(j=s.length-1;j>=0;--j)
	{
	 if(s.charAt(j)!=" ")
		break;
	}

	return s.substring(i,++j);
}


function isNumberString (InString,RefString)
{
	if(InString.length==0) return (false);
	for (Count=0; Count < InString.length; Count++)
	{	TempChar= InString.substring (Count, Count+1);
		if (RefString.indexOf (TempChar, 0)==-1)  
		return (false);
	}
	return (true);
}




function  checkunion()
{

   unionname = del_space(document.unionform.name.value);
     if (unionname.length == 0)
     {
        alert("请输入网站名称!");
	    return false;
     }
	 
	unionurl = del_space(document.unionform.url.value);

     if (unionurl.length < 10)
     {
        alert("请输入您网站的正确网址，以http://开头!");
	return false;
     }

 if (unionurl.indexOf("http://") <0)
     {
        alert("请输入您网站的正确网址，必须以[http://]开头!");
	return false;
     }





	 uniontype = Trim(document.unionform.uniontype.value);
    if (uniontype.length == 0)
     {
        alert("请选择网站所属类型！");
	return false;
     }



	area = Trim(document.unionform.area.value);

     if (area.length == 0)
     {
        alert("请选择网站所属地区！");
		return false;
     }


	 
	 contactperson = del_space(document.unionform.contactperson.value);
     if (contactperson.length < 2)
     {
        alert("请正确输入网站联系人");
        return false;
     }
	 
	 tel = del_space(document.unionform.tel.value);
     if (tel.length<7)
     {
        alert("请输入联系人电话！");
        return false;
     }

     if (isNumberString(tel,"1234567890-")!=1)
     {
        alert("请输入正确的联系人电话!,只能由数字和-组成");
        return false;
     }



	 position = del_space(document.unionform.position.value);
     if (position.length == 0)
     {
        alert("请填写您的网站排名!");
	return false;
     }		


   if (isNumberString(position,"1234567890")!=1)
     {
        alert("请输入正确的网站排名!,必须是数字");
        return false;
     }





	email = del_space(document.all("email").value);
     if (email.length == 0)
     {
        alert("请输入Email!");
	return false;
     }
	 
     if (email.indexOf("@")==-1)
     {
        alert("Email地址无效!");
	return false;
     }
	 
	email = del_space(document.all("email").value);
     if (email.indexOf(".")==-1)
     {
        alert("Email地址无效!");
	return false;
     }

	 return true;




}