View difference between Paste ID: HL2zr1n7 and TZGmYkPB

 //javascript.js**************
 function Section() {
     this.currentKey;
     this.offsets;
     this.sectionID;
     this.prefixPath;
     this.topOffset;
 }
 
 //constructor
 Section.prototype.construct = function (topOffset) {
 
     this.sectionID = ['heim', 'tilbud', 'galleri', 'feedback'];
     this.offsets = [];
     this.prefixPath = 'body>section#content>section#';
     this.topOffset = topOffset;
 
     //sets the offsets values
     for (var u = 0; u < this.sectionID.length; u++) {
         this.offsets[u] = $(this.prefixPath+this.sectionID[u]).offset().top;
     }
     return false;
 }
 
 //change attribute
 Section.prototype.changeIDString = function () {
     //gets the currentKey
     for (var i = 0; i < this.offsets.length; i++) {
         if (i + 1 != this.offsets.length) {
             if (this.topOffset >= this.offsets[i] && this.topOffset < this.offsets[i + 1]) {
                 this.currentKey = i;
                 break;
             }
         } else if (this.topOffset >= this.offsets[i]) {
             this.currentKey = i;
             break;
         }
     }
     return false;
 }
 
 //get current
 Section.prototype.getIDString = function () {
     return this.sectionID[this.currentKey];
 }
 
 //set classes
 Section.prototype.setAttributes = function () {
     $('#current').removeAttr('id');
     $('[data-gotoSection="#' + this.getIDString() + '"]').attr('id', 'current');
 }
 
 
 var Section = new Section();
 
 
 
 //footer.php*****************
 [...]
 	//find the section
 	Section.construct(topOffset);
 	Section.changeIDString();
 	Section.setAttributes();
 [...]