// JavaScript Document
function change(picture) { document.overimage.src = picture}
function doBlink() {
	var blink = document.all.tags("BLINK")
	for (var i=0; i<blink.length; i++)
		blink[i].style.visibility = blink[i].style.visibility == "" ? "hidden" : "" 
}

function startBlink() {	
	if (document.all)	setInterval("doBlink()",1000)
}
window.onload = startBlink;


		
function Input_ChangeSelect(obj, perf){
	var elObj = document.getElementById(obj);
	switch (perf){
		case "next":
			for(i=elObj.options.length;i>0;i--){
				if (elObj.options[i-1].selected){
					elObj.options[i-1].selected = false;
					if (elObj.options[i]){
						elObj.options[i].selected = true;
					}
				}
			}
			break;
		case "first":
			for(var i=0;i<elObj.options.length;i++){
				if (!i){
					elObj.options[i].selected = true;
				} else {
					elObj.options[i].selected = false;
				}
			}
			break;
		case "prev":
			for(var i=0;i<elObj.options.length;i++){
				if (elObj.options[i].selected){
					elObj.options[i].selected = false;
					if (elObj.options[i-1])
						elObj.options[i-1].selected = true;
				}
			}
			break;
		case "last":
			for(i=elObj.options.length;i>0;i--){
				if (i==elObj.options.length){
					elObj.options[i-1].selected = true;
				} else {
					elObj.options[i-1].selected = false;
				}
			}
			break;
	}
}