移动端滑动自动加载

//获取窗口可视范围的高度
function getClientHeight(){
var clientHeight=0;
if(document.body.clientHeight&&document.documentElement.clientHeight){
clientHeight=(document.body.clientHeight<document.documentElement.clientHeight)?document.body.clientHeight:document.documentElement.clientHeight;
}else{
clientHeight=(document.body.clientHeight>document.documentElement.clientHeight)?document.body.clientHeight:document.documentElement.clientHeight;
}
return clientHeight;
}

function getScrollTop(){
var scrollTop=0;
scrollTop=(document.body.scrollTop>document.documentElement.scrollTop)?document.body.scrollTop:document.documentElement.scrollTop;
return scrollTop;
}
//滚动加载
function scrollLoad(){
//可视窗口的高度
var scrollTop = 0;
var scrollBottom = 0;
$(document).scroll(function(){
var dch = getClientHeight();
scrollTop = getScrollTop();
scrollBottom = document.body.scrollHeight - scrollTop;
if(scrollBottom >= dch && scrollBottom <= (dch+10)){
//滚动加载备选的项目
if($(".info_tab a").eq(0).hasClass("cur")){
var rlen=(start_offset+1)*limit1;
var tlen=parseInt($(".info_tab a").eq(0).attr("total"));
if(flag&&(tlen>rlen)){
start_offset++;
flag=false;
follow_pro(start_offset);
}
}
//滚动加载投资的项目
if($(".info_tab a").eq(1).hasClass("cur")){
var rlen=(follow_offset+1)*limit1;
var tlen=parseInt($(".info_tab a").eq(1).attr("total"));
if(flag&&(tlen>rlen)){
follow_offset++;
flag=false;
inv_pro(follow_offset);
}
}
//滚动加载项目招标
if($(".info_tab a").eq(2).hasClass("cur")){
var rlen=(rec_offset+1)*limit1;
var tlen=parseInt($(".info_tab a").eq(2).attr("total"));
if(flag&&(tlen>rlen)){
rec_offset++;
flag=false;
xmzb_pro(rec_offset);
}
}

}
});
}
scrollLoad();