function switch_image(image_source) {
	if (document.images)
		document["main"].src = "images/image.php?image=" + image_source;
}


document.getElementByClass = function(classname) {
	var inc = 0;
	var alltags = document.all ? document.all : document.getElementsByTagName("*");
	for (i = 0; i < alltags.length; i++) {
		if (alltags[i].className == classname)
			inc++;
	}
	var result = new Array(inc);
	inc = 0;
	for (i = 0; i < alltags.length; i++) {
		if (alltags[i].className == classname)
			result[inc++] = alltags[i];
	}	
	return result;
}

function toggle_search(from_class, to_class) {
	var toShow = document.getElementByClass(to_class);
	for (i = 0; i < toShow.length; ++i) {
		toShow[i].style.display = "block";
	}
	var toHide = document.getElementByClass(from_class);
	for (i = 0; i < toHide.length; ++i) {
		toHide[i].style.display = "none";
	}
}