function pageBack(){
history.back();
}

var eventTimer;
var restScroll=0;

function Scroll(base,move){
    var obj_base = getElemPosition(base);
    var elem_move = document.getElementById(move);
    var obj_move = getElemPosition(elem_move);
    restScroll = obj_move.y-obj_base.y;
    eventTimer = setInterval(setScrollPosition,10);
}

function setScrollPosition() {
    var moveValue=0;
    if(Math.abs(restScroll)>80){
        moveValue = (restScroll>0)?20:-20;
    }else{
        moveValue = Math.round(restScroll/4);
    }
    parent.scrollBy(0,moveValue);
    restScroll = (restScroll>0)?restScroll-moveValue:restScroll-moveValue;
    if(moveValue==0){
        clearInterval(eventTimer);
        restScroll=0;
    }
}

function getElemPosition(elem) {
    var obj = new Object();
    obj.x = elem.offsetLeft;
    obj.y = elem.offsetTop;
    while(elem.offsetParent) {
        elem = elem.offsetParent;
        obj.x += elem.offsetLeft;
        obj.y += elem.offsetTop;
    }
    return obj;
}