/*
  usage:
  <img src="one.gif" onmouseout="change_img(this, false)" onmouseover="change_img(this, true)" overimg="ont-over.gif" />
*/
function change_img(obj, over)
{
	obj = $(obj);
	if (over) {
  	obj.origin = obj.src;
    obj.src = obj.overimg;
  }else{
	  obj.src = obj.origin;
  }
}

function preload(imgpath, imgs)
{
	var img = new Image();
	for (var i=0; i<imgs.length; i++) {
		img.src = imgpath + imgs[i];
	}
}

function clean(obj, value)
{
  obj = $(obj);
  if (obj.value == value) obj.value = '';    
}

function goto(url)
{
  location.href = url;
}

window.load = function() 
{
  
}