arkadaşlar aşağıdaki kod ne işe yarıyor bulabilirmiyiz ?





function next(){
refVar[0].innerHTML = ""+refVar[0].text+"";
if(nextval else {nextval = 0;}
Element.prototype.documentOffsetTop = function () {
return this.offsetTop + ( this.offsetParent ? this.offsetParent.documentOffsetTop() : 0 );
};
var top = a[nextval].documentOffsetTop() - (window.innerHeight / 2 );
window.scrollTo( 0, top );
refVar[0] = a[nextval];
refVar[0].innerHTML = ""+refVar[0].text+"";
testSpeech();
}



function back(){
refVar[0].innerHTML = ""+refVar[0].text+"";
if(nextval>0){nextval--;}
else {nextval =( a.length -1);}
refVar[0] = a[nextval];
refVar[0].innerHTML = ""+refVar[0].text+"";
Element.prototype.documentOffsetTop = function () {
return this.offsetTop + ( this.offsetParent ? this.offsetParent.documentOffsetTop() : 0 );
};
var top = a[nextval].documentOffsetTop() - (window.innerHeight / 2 );
window.scrollTo( 0, top );
testSpeech();
}