//TR SELECT
function TRoverout(form_name, tr, overout, ClassOver, ClassOut){
	var f=eval("document."+form_name);
	var obj_tr=document.getElementById(tr);
	
	if(overout=="over")
	  obj_tr.className =ClassOver;
	else
	  obj_tr.className =ClassOut;
}

//IMAGENES NAV TOP
function newImage(img) {
	if (document.images) {
		an_image = new Image();
		an_image.src = img;
		return an_image;
	}
}

function preloadImages() {
var the_images="";
  for(i = 1; i <= 4; i++){
	  the_images=the_images+"images/top"+i+"ovr.gif,";
  }
  the_images=the_images.substr(0,(the_images.length-1));

  if(the_images){
    var the_images_array=the_images.split(",");
    for(var loop = 0; loop < the_images_array.length; loop++){
	  newImage(the_images_array[loop]);
    }
	return PreloadOk = true;
  }
}

function ChangeImg() {
    document.images[ChangeImg.arguments[0]].src=ChangeImg.arguments[1];
}

//POP-UP
var win = null;
function NewWindow(mypage,myname,w,h,scroller,resize){
LeftPosition = (screen.width) ? (screen.width-w)/2 : 0;
TopPosition = (screen.height) ? (screen.height-h)/2 : 0;
settings =
'height='+h+',width='+w+',top='+TopPosition+',left='+LeftPosition+',scrollbars='+scroller+',resizable='+resize
win = window.open(mypage,myname,settings);
win.focus();
}

//FORM
function BorroForm(form_name){
	 for(var i=0; i<eval("document."+form_name).elements.length;i++){
	   tipo=eval("document."+form_name).elements[i].type;
	   file=eval("document."+form_name).elements[i];
	   if(tipo=="text" || tipo=="textarea" || tipo=="textarea"){
	     file.value='';
	   }else if(tipo=="radio" || tipo=="checkbox"){
	     file.checked=false;
	   }else if(eval("document."+form_name).elements[i].type=="select-one"){
	     file.options.selectedIndex=file.options[0];
	   }
     }
	 return false;
}