function swapImage(use_image, over){
	if(document.images){
		var oImg = document.images[use_image];
		var suffix = "";
		
		if(String(oImg) != "undefined"){
			if(swapImage.arguments.length > 2){
				 new_src = swapImage.arguments[2];
			}else{
				new_src = String(oImg.src);
								
				if(over){
					path = new_src.slice(0, -4);
					ext = new_src.slice(path.length);
					new_src = path + "_over" + ext;
				}else{
					path = new_src.slice(0, -9);
					ext = new_src.slice(path.length + 5);
					new_src = path + ext;
				}							
			}
			
			oImg.src = new_src;
		}
	}
}	// end swapImage

function toggleVis(id){
	var element = document.getElementById(id);

	if(element.style.display == "none"){
		element.style.display = "block";
	} else {
		element.style.display = "none"
	}

}	// end toggleVis

function toggledateblock(enable) {
	if(String(document.f.rel_year) != "undefined"){
		if(enable) {
			document.f.rel_year.disabled = false;
			document.f.rel_day.disabled = false;
			document.f.rel_month.disabled = false;
			document.f.rel_time_hour.disabled = false;
			document.f.rel_time_min.disabled = false;
			toggled = false;
		}else{
			document.f.rel_year.disabled = true;
			document.f.rel_day.disabled = true;
			document.f.rel_month.disabled = true;
			document.f.rel_time_hour.disabled = true;
			document.f.rel_time_min.disabled = true;
			toggled = true;
		}	
	}
}	// end toggledateblock