function preloadImages() {
	var d=document;
	if(d.images) {	
		if (! d.arr_preImgs) {
				d.arr_preImgs=new Array();
		}
		var i, j=d.arr_preImgs.length, a=preloadImages.arguments;
		for (i=0; i<a.length; i++) {
			if (a[i].indexOf("#")!=0) {
				d.arr_preImgs[j]=new Image;
				d.arr_preImgs[j++].src=a[i];
			}
		}
	}
}

function showHide(div_id, action) {
	if (action == 'show') {
		document.getElementById(div_id).style.display='block';
	} else {
		document.getElementById(div_id).style.display='none';
	}
}