var lastScrollY=0;
function scroll(){ 
	var diffY;
	if (document.documentElement && document.documentElement.scrollTop)
	    diffY = document.documentElement.scrollTop;
	else if (document.body)
	    diffY = document.body.scrollTop
	else
	    {/*Netscape stuff*/}
	
	percent=.1*(diffY-lastScrollY); 
	if(percent>0)percent=Math.ceil(percent); 
	else percent=Math.floor(percent); 	
	document.getElementById("imcss").style.top=parseInt(document.getElementById("imcss").style.top)+percent+"px";	
	lastScrollY=lastScrollY+percent; 
}

function i_im_initIM() {
	setInterval("scroll()",1);
}

window.onload = function() {
	i_im_initIM();	
};