function animate(obj,elm,begin,end,duration,fps) {
     
	 if(!duration) duration=1000;
     if(!fps) fps = 12;

     var change       = end-begin;
     var interval     = Math.ceil(1000/fps);
     var totalFrames  = Math.ceil(duration/interval);
     var fixedStep    = change/totalFrames;
            
     for(i=1;i<=totalFrames;i++) {
        (function() {
           var frame=i;
           function inner() {
              //var actualValue=begin+fixedStep*frame;
			  var actualValue=(change*frame/totalFrames)*(frame/totalFrames)+begin;
			  //var increase=easeQuad(begin,change,totalFrames,frame);

              unit=(elm=='opacity') ? '' : 'px';
              if(window.attachEvent && !unit) { 
                  actualValue*=100; 
                  obj.style.zoom = 1;
                  obj.style.filter = "alpha(opacity=" + actualValue + ")" ;
              } else {
                  obj.style[elm]  = actualValue+unit; 
              }
           }
           timer = setTimeout(inner,interval*frame);
        })();
    }
}

function easeQuad(begin,change,totalframes,frame) {
 return (change*frame/totalframes)*(frame/totalframes)+begin;
}


function init(){ 

if(getElementById("popover") != null || getElementById("popover_ie") != null){

 var browserName=navigator.appName; 
 if (browserName=="Microsoft Internet Explorer")
 {	
  animate(document.getElementById("popover_ie"),'opacity',0,1,500,30);
  //document.getElementById("popover_ie").style.display = "block"
  document.getElementById("store_btn").style.display = "block"
  document.getElementById("close_btn").style.display = "block"
  
  
  
  btn = document.getElementById("close_btn")
	
	btn.onmousedown = function(){
		animate(document.getElementById("popover_ie"),'opacity',1,0,500,30);
		document.getElementById("store_btn").style.display = "none"
  		document.getElementById("close_btn").style.display = "none"
	}
	
 }else{
    animate(document.getElementById("popover"),'opacity',0,1,500,30);
	
	btn = document.getElementById("close_btn")
	
	document.getElementById("close").onmousedown = function(){
		animate(document.getElementById("popover"),'opacity',1,0,500,30);
	}
	
}
	
}
	
	
	
}