function rePos(el,id,dx,dy){
var ido6 = navigator.appVersion.indexOf('MSIE 6.0');
var ido7 = navigator.appVersion.indexOf('MSIE 7.0');
var ido8 = navigator.appVersion.indexOf('Trident');
if((ido6!=-1)&&(ido7==-1)&&(ido8==-1)){ie6=true;}else{ie6=false;}
if((ido7!=-1)&&(ido6==-1)&&(ido8==-1)){ie7=true;}else{ie7=false;}
if(ido8!=-1){ie8=true;}else{ie8=false;}
var ied=0;
if(ie7||ie8){
ied=-220;
}
var scrollPos;
if (typeof window.pageYOffset != 'undefined') {
scrollPos = window.pageYOffset;
}
else if (typeof document.compatMode != 'undefined' &&
document.compatMode != 'BackCompat') {
scrollPos = document.documentElement.scrollTop;
}
else if (typeof document.body != 'undefined') {
scrollPos = document.body.scrollTop;
}
el = document.getElementById(el);
if(false){
alert(errorMsg);
}else{
for (var lx=0, ly=0; el!=null;lx+=el.offsetLeft,ly+=el.offsetTop,el=el.offsetParent);
document.getElementById(id).style.top = (ly+dy+ied-scrollPos)+"px"; 
document.getElementById(id).style.left=parseInt(document.getElementById(id).style.left)+"px";
}
}