var mKey,mKeynum;
var intervalo;
var author="julifos";

document.onkeydown = myKeyDown

function myKeyDown() {
	mKeynum =event.keyCode;
	x = parent.frames['lf'].current_img;
	if (mKeynum == 39 || mKeynum == 40) { // left
		parent.frames['lf'].current_img = x + 1;
	} else if (mKeynum == 37 || mKeynum == 38) {
		parent.frames['lf'].current_img = x - 1;
	}
	paYohazAlgo();
}

function paYohazAlgo() {
	z = parent.frames['lf'].current_img;

	if (x != z) {

		if (z == parent.frames['lf'].index_array.length) {
			parent.frames['lf'].current_img = x;
			alert("You reached the last image!");
		} else if (z == -1) {
			parent.frames['lf'].current_img = 0;
			alert("You reached the first image!");
		} else {
			parent.frames['lf'].kambia(z);
		}
	}

}

function doIt(m) {
	x = parent.frames['lf'].current_img;
	if (m == 0) {
		parent.frames['lf'].current_img = x - 1;
	} else {
		parent.frames['lf'].current_img = x + 1;
	}
	paYohazAlgo();
}

function rotarmundi(){
  if(document.forms[0].elements[2].value == " Stop Slideshow "){
 	kannabis = parent.frames['lf'].current_img;
	if (kannabis == ((parent.frames['lf'].index_array.length)-1)) {
		parent.frames['lf'].current_img = -1;
	}
	doIt(1);
	setTimeout("rotarmundi()", intervalo);
  } else {
	document.forms[0].elements[2].value == " Slideshow ";
  }
}

function slideshow(){
  if (document.forms[0].elements[2].value == " Stop Slideshow ") {
	 document.forms[0].elements[2].value = " Slideshow ";
  } else {
	promptear(); 
 }
}

function promptear(){
	intervalo=prompt("Interval between fonts (in seconds)...\rE.g.> 3, 1.5, 10...","3");
	if (intervalo != null) {
		intervalo=intervalo*1000;
		document.forms[0].elements[2].value = " Stop Slideshow ";
		rotarmundi();
	}
}