You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
68 lines
2.2 KiB
Plaintext
68 lines
2.2 KiB
Plaintext
11 months ago
|
window.$ = HTMLElement.prototype.$ = function (selector) {
|
||
|
|
return (this == window ? document : this).querySelectorAll(selector);
|
||
|
|
}
|
||
|
|
|
||
|
|
window.onload = function () {
|
||
|
|
nav.init();
|
||
|
|
}
|
||
|
|
var nav = {
|
||
|
|
LIHEIGHT: 110,
|
||
|
|
moved: 0,
|
||
|
|
count: 0,
|
||
|
|
ul: null,
|
||
|
|
btnT: null,
|
||
|
|
btnB: null,
|
||
|
|
init: function () {
|
||
|
|
this.ul = $("#nav")[0];
|
||
|
|
this.btnT = this.ul.parentNode.$("i")[0];
|
||
|
|
this.btnB = this.ul.parentNode.$("i")[1];
|
||
|
|
this.btnT.onclick = this.btnB.onclick = function () {
|
||
|
|
nav.move(this);
|
||
|
|
};
|
||
|
|
this.count = this.ul.$("li").length;
|
||
|
|
},
|
||
|
|
move: function (btn) {
|
||
|
|
if (typeof String.prototype.endsWith != 'function') {
|
||
|
|
String.prototype.endsWith = function (suffix) {
|
||
|
|
return this.indexOf(suffix, this.length - suffix.length) !== -1;
|
||
|
|
};
|
||
|
|
}
|
||
|
|
if (!btn.className.endsWith("_disabled")) {
|
||
|
|
this.count = this.ul.$("li").length;
|
||
|
|
if (this.count < 5) {
|
||
|
|
this.btnT.className += "_disabled";
|
||
|
|
this.btnB.className += "_disabled";
|
||
|
|
} else {
|
||
|
|
if (btn == this.btnB) {
|
||
|
|
this.ul.style.top =
|
||
|
|
-(this.LIHEIGHT * (++this.moved) - 30) + "px";
|
||
|
|
} else {
|
||
|
|
this.ul.style.top =
|
||
|
|
-(this.LIHEIGHT * (--this.moved) - 30) + "px";
|
||
|
|
}
|
||
|
|
this.btnEnable();
|
||
|
|
}
|
||
|
|
}
|
||
|
|
},
|
||
|
|
btnEnable: function () {
|
||
|
|
this.count = this.ul.$("li").length;
|
||
|
|
if (this.moved == 0) {
|
||
|
|
this.btnT.className += "_disabled";
|
||
|
|
if (this.count == 5) {
|
||
|
|
this.btnB.className =
|
||
|
|
this.btnB.className.replace("_disabled", "");
|
||
|
|
}
|
||
|
|
} else if (this.count - this.moved == 4) {
|
||
|
|
this.btnB.className += "_disabled";
|
||
|
|
if (this.count == 5) {
|
||
|
|
this.btnT.className =
|
||
|
|
this.btnT.className.replace("_disabled", "");
|
||
|
|
}
|
||
|
|
} else {
|
||
|
|
this.btnT.className =
|
||
|
|
this.btnT.className.replace("_disabled", "");
|
||
|
|
this.btnB.className =
|
||
|
|
this.btnB.className.replace("_disabled", "");
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|