A small example of javascript detecting whether the page is zoomed_javascript skills

/*
* zoomCheck
*/
jQuery(function($){
var dCheck = $("#zoomCheck");
if(dCheck.size() != 0){
return;
}
dCheck = $("").attr('id',"zoomCheck").css({
position :'fixed',
left : '5px'
} ).hide().appendTo('body');
var time;
time = setInterval(function(){
dCheck.show();
var left = dCheck.position() .left;
dCheck.hide();
if(left != 5){
clearInterval(time);
alert('Your page is in a zoomed state, and there will be problems with page display. Please set it to normal status windows:ctrl 0 mac:command 0');
}
},2000);
});