IIS7.5已启用父路径，new Ajax.Request('/./路径,options);404异常无法找到资源

IIS7.5已启用父路径，new Ajax.Request('../../路径,options);404错误无法找到资源

 iis7.5，   无法自动根据相对路径找到对应网页

function selectFile(type,obj,height,width)
{
 
  var vitualPath=getRootPath();
    var ShowObj = obj;
    if(isArray(obj) && obj.length > 1)
        ShowObj = obj[1];
    showfDiv(ShowObj,"loading...",width);
    LastSelectObj = obj;
    
var  options={  
   method:'get',  
   parameters:"heights="+ height,  
   onComplete:function(transport)
{  
var returnvalue=transport.responseText;
if (returnvalue.indexOf("??")>-1)
showfDiv(ShowObj,'Error',width);
else
var tempstr=returnvalue;
showfDiv(ShowObj,tempstr,width);
}  
   }; 
var arrtype=type.split("|")[0]
    switch(arrtype)
        {
            case "file":
            new  Ajax.Request('../../configuration/system/iframe.aspx?FileType=file',options);
            break;
        case "pic":
            new  Ajax.Request('../../configuration/system/iframe.aspx?FileType=pic',options);
            break;
[解决办法]