function center_stuff(id1,id2,id3,buffer){
	//script to center 1 to 3 images no matter what the screen width. with a buffer in between
	var window_size=document.body.clientWidth;//window_size= window.innerWidth; doesn't work on IE

	if((id2)&&(id3)){
		var img_size1=parseInt(document.getElementById(id1).getAttribute("width"));
		var img_size2=parseInt(document.getElementById(id2).getAttribute("width"));
		var img_size3=parseInt(document.getElementById(id3).getAttribute("width"));
		//buffer=parseInt(buffer);
		var total_width=img_size1+buffer+img_size2+buffer+img_size3;
		var side_area=((window_size-total_width)/2);
		if (window_size < total_width){
			buffer=(window_size-img_size1-img_size2-img_size3)/2;
			side_area=0;
		}
		document.getElementById(id1).style.left=side_area+"px";
		document.getElementById(id2).style.left=(side_area+img_size1+buffer)+"px";
		document.getElementById(id3).style.left=(side_area+img_size1+buffer+img_size2+buffer)+"px";
	}else if(id2){
		var img_size1=parseInt(document.getElementById(id1).getAttribute("width"));
		var img_size2=parseInt(document.getElementById(id2).getAttribute("width"));
		var side_area=((window_size-total_width)/2);
		if (window_size < total_width){
			buffer=(window_size-img_size1-img_size2-img_size3)/2;
			side_area=0;
		}
		var total_width=img_size1+buffer+img_size2;
		document.getElementById(id1).style.left=side_area+"px";
		document.getElementById(id2).style.left=side_area+"px";
	
	}else{
		var img_size1=document.getElementById(id1).getAttribute("width");
		var offset=(window_size/2)-(img_size1/2);
		document.getElementById(id1).style.left=offset+"px";
	}
}