function getElementsBySelector(selector){
var i,selid="",selclass="",tag=selector,f,s=[],objlist=[];

if(selector.indexOf(" ")>0){  //descendant selector like "tag#id tag"
    s=selector.split(" ");
    var fs=s[0].split("#");
    if(fs.length==1) return(objlist);
    f=document.getElementById(fs[1]);
    if(f) return(f.getElementsByTagName(s[1]));
    return(objlist);
    }
if(selector.indexOf("#")>0){ //id selector like "tag#id"
    s=selector.split("#");
    tag=s[0];
    selid=s[1];
    }
if(selid!=""){
    f=document.getElementById(selid);
    if(f) objlist.push(f);
    return(objlist);
    }
if(selector.indexOf(".")>0){  //class selector like "tag.class"
    s=selector.split(".");
    tag=s[0];
    selclass=s[1];
    }
var v=document.getElementsByTagName(tag);  // tag selector like "tag"
if(selclass=="")
    return(v);
for(i=0;i<v.length;i++){
    if(v[i].className == selclass) {
        objlist.push(v[i]);
        }
    }
return(objlist);
}