javascript检测页面是否缩放

/*
* zoomCheck
*/
jQuery(function($){
var dCheck = $("#zoomCheck");
if(dChecksize() != ){
return;
}
dCheck = $("<span></span>")attr(id"zoomCheck")css({
position :fixed
left : px
})hide()appendTo(body);
var time;
time = setInterval(function(){
dCheckshow();
var left = dCheckposition()left;
dCheckhide();
if(left != ){
clearInterval(time);
alert(你的页面处于缩放状态页面显示会有问题请设置为正常状态windows:ctrl+ mac:command+);
}
});
});