- var main_left = Math.round($(".main").offset().left+980)+"px";
- var back_top_ele = "<a href='javascript:;' id='back_top'></a>";
- var back_top_sty = {width:"15px", height:"60px", bottom:"100px", left:main_left, position:"fixed", display:"none", background:"red" };
- $("body").append(back_top_ele);
- $("#back_top").CSS(back_top_sty);
- $(window).scroll(function(){
- if( $(window).scrollTop() > 200 ){
- if ($.browser.msie && ($.browser.version == "6.0") && !$.support.style) {
- $("#back_top").css({ display:"block", position:"absolute", top:$(window).scrollTop()+450+"px"});
- }else{
- $("#back_top").css({ display:"block", position:"fixed"});
- }
- }else{
- $("#back_top").hide();
- }
- });
- $(window).resize(function(){
- if($(window).width() <= 1000){
- main_left = $(window).width()-20+"px";
- }else{
- main_left = Math.round($(".main").offset().left+980)+"px";
- }
- $("#back_top").css("left",main_left);
- });
- $("#back_top").click(function(){
- $("html, body").animate({scrollTop:0}, 500);
- return false;
- });
- //该片段来自于http://www.codesnippet.cn/detail/030920135589.html
来源: http://www.codesnippet.cn/detail/030920135589.html