var scrolltotop = {
setting: {
startline: 100,
scrollto: 0,
scrollduration: 1000,
fadeduration: [500, 100]
},
controlHTML: '
',
controlattrs: {
offsetx: 55,
offsety: 98
},
anchorkeyword: "#top",
state: {
isvisible: false,
shouldvisible: false
},
scrollup: function () {
if (!this.cssfixedsupport) {
this.$control.css({
opacity: 0
})
}
var a = isNaN(this.setting.scrollto) ? this.setting.scrollto: parseInt(this.setting.scrollto);
if (typeof a == "string" && jQuery("#" + a).length == 1) {
a = jQuery("#" + a).offset().top
} else {
a = 0
}
this.$body.animate({
scrollTop: a
},
this.setting.scrollduration)
},
keepfixed: function () {
var c = jQuery(window);
var b = c.scrollLeft() + c.width() - this.$control.width() - this.controlattrs.offsetx;
var a = c.scrollTop() + c.height() - this.$control.height() - this.controlattrs.offsety;
this.$control.css({
left: b + "px",
top: a + "px"
})
},
togglecontrol: function () {
var a = jQuery(window).scrollTop();
if (!this.cssfixedsupport) {
this.keepfixed()
}
this.state.shouldvisible = (a >= this.setting.startline) ? true: false;
if (this.state.shouldvisible && !this.state.isvisible) {
this.$control.stop().animate({
opacity: 1
},
this.setting.fadeduration[0]);
this.state.isvisible = true
} else {
if (this.state.shouldvisible == false && this.state.isvisible) {
this.$control.stop().animate({
opacity: 0
},
this.setting.fadeduration[1]);
this.state.isvisible = false
}
}
},
init: function () {
jQuery(document).ready(function (c) {
var a = scrolltotop;
var b = document.all;
a.cssfixedsupport = !b || b && document.compatMode == "CSS1Compat" && window.XMLHttpRequest;
a.$body = (window.opera) ? (document.compatMode == "CSS1Compat" ? c("html") : c("body")) : c("html,body");
a.$control = c('
js/scrolltop.js
06:09
' + a.controlHTML + "
").css({
position: a.cssfixedsupport ? "fixed": "absolute",
bottom: a.controlattrs.offsety,
left: a.controlattrs.offsetx,
opacity: 0,
cursor: "pointer",
"z-index": "1"
}).attr({
title: "Scroll Back to Top"
}).click(function () {
a.scrollup();
return false
}).appendTo("body");
if (document.all && !window.XMLHttpRequest && a.$control.text() != "") {
a.$control.css({
width: a.$control.width()
})
}
a.togglecontrol();
c('a[href="' + a.anchorkeyword + '"]').click(function () {
a.scrollup();
return false
});
c(window).bind("scroll resize", function (d) {
a.togglecontrol()
})
//////
$(window).scroll(function () {
if ($(this).scrollTop() > 54) {
$("#hide").css({
"z-index": "99999",
position: "fixed",
width: "100%",
top: "0"
})
} else {
$("#hide").css({
position: "relative",
top: "auto"
})
}
})
/////
})
}
};
scrolltotop.init();
