ppurl="http://passport.yinsha.com/";
ppurl2="http://passport.bliao.com/";
document.write("<form name=\"myform\" method=\"POST\" action=\""+ppurl2+"checkvalid.php\" target=\"_blank\" onsubmit=\"return validform(this)\">")
document.write("<a href=\"http://passport.yinsha.com/\" target=\"_blank\">银沙通行证</a> 帐号: <INPUT class=\"sr\" tabIndex=1 maxlength=\"40\" name=\"name\"> 密码: <INPUT class=\"sr\" tabIndex=1 maxlength=\"16\" name=\"passwd\" type=password>")
document.write("    <select name=\"targetchannel\" size=\"1\">")
document.write("      <option value=\"bbs\" selected>社区论坛</option>")
document.write("      <option value=\"wind\">文学</option>")
document.write("      <option value=\"diary\">日记</option>")
document.write("      <option value=\"album\">相册</option>")
document.write("      <option value=\"blog\">博客</option>")
document.write("      <option value=\"info\">分类信息</option>")
document.write("      <option value=\"job\">人才</option>")
document.write("      <option value=\"house\">房产</option>")
document.write("      <option value=\"city\">数字湛江</option>")
document.write("      <option value=\"biz\">商企平台</option>")
document.write("      <option value=\"chat\">碧聊</option>")
document.write("      <option value=\"photo\">摄影</option>")
document.write("      <option value=\"card\">贺卡</option>")
document.write("      <option value=\"personal\">书签</option>")
document.write("      <option value=\"alumni\">校友</option>")
document.write("      <option value=\"love\">交友</option>")
document.write("      <option value=\"passport\">会员中心</option>")
document.write("    </select></div>")
document.write("    <div class=\"login_btn\"><input type=\"image\" src=\"http://www.yinsha.com/ver2010/images/login_btn.gif\">")
document.write("    <a href=\""+ppurl+"register.php\" title=\"注册为银沙通行证用户，一证畅游银沙社区所有加盟频道！\" target=\"_blank\"><img src=\"http://www.yinsha.com/ver2010/images/zhuce_btn.gif\" style=\"margin-left:8px;\"></a>")
document.write("	<input type=\"hidden\" name=\"mode\" value=\"upgrade\">")
document.write("	<input type=\"hidden\" name=\"loginmode\" value=\"lock\">")
document.write("</form>")
function trim(string) {
   var tmpchar, i, j, result;
   i = 0;
   tmpchar = string.charAt(i);
   while (tmpchar == ' ') {
      i++;
      tmpchar = string.charAt(i);
   }

   j = string.length - 1;
   tmpchar = string.charAt(j);
   while (tmpchar == ' ') {
      j --;
      tmpchar = string.charAt (j);
   }
   if ( i <= j)
      result = string.substring(i,j+1);
   else
      result = "";
   return result;
}


function validpassword(fieldname,string,len){
	string.value=trim(string.value);
	if (string.value.length <len) {
		alert(fieldname+"应大于等于"+len+"位!");
		string.focus();
      		return false;
	}
   return true;
}
              
function notNull(fieldname,string){
   string.value=trim(string.value);
   if (string.value == "") {
      alert(fieldname+"不能为空");
      string.focus();
      return false;
                    }
  else 
   return true;
}
function validform(theform){
	if(notNull("通行证",theform.name)&&notNull("密码",theform.passwd)&&validpassword("密码",theform.passwd,2)) return true;
	return false;
}