(function($){
//返回顶部和底部插件
$.fn.extend({
goTopBootom:function (options){
//默认参数
var defaults = {
"upBtn":".up", //被点击返回顶部的按钮
"downBtn":".down", //被点击返回底部的按钮
"inTms":300, //此功能元素出现的时间
"outTms":300, //此功能元素隐藏的时间
"speed":500 //返回顶部或者底部的速度
};
var options = $.extend(defaults,options)
return this.each(function(){
var _this = $(this);
var oHtmlBody = $('html,body');
var oBodyH = document.body.clientHeight;
var oUp = $(this).find(options.upBtn);
var oDown = $(this).find(options.downBtn);
$(this).css("top",window.screen.availHeight/2-100+"px");
$(window).scroll(function() {
if($(window).scrollTop() >= 200){
_this.fadeIn(options.inTms);
}else{
_this.fadeOut(options.inTms);
}
});
oUp.click(function(){oHtmlBody.animate({scrollTop: '0px'}, options.speed);});
oDown.click(function(){oHtmlBody.animate({scrollTop: oBodyH + 'px'}, options.speed);});
});
},
//解决ie6下fixed插件
ie6fixedbug: function () {
return this.each(function(){
var m = (window.screen.height - $(this).height()) / 3;
var obj = $(this);
$(window).scroll(function () {
obj.css("top",(document.body.scrollTop || document.documentElement.scrollTop) + m + 'px');
});
$(window).resize(function () {
obj.css("top",(document.body.scrollTop || document.documentElement.scrollTop) + m + 'px');
});
});
}
});
}(jQuery));