function addLoadEvent(func) {
var oldonload = window.onload;
if (typeof window.onload != 'function') {
window.onload = func;
} else {
window.onload = function() {
oldonload();
func();
}
}
}
function getElementsByClass(searchClass,node,tag) {
var classElements = new Array();
if ( node == null )
node = document;
if ( tag == null )
tag = '*';
var els = node.getElementsByTagName(tag);
var elsLen = els.length;
var pattern = new RegExp('(^|\\s)'+searchClass+'(\\s|$)');
for (i = 0, j = 0; i < elsLen; i++) {
if ( pattern.test(els[i].className) ) {
classElements[j] = els[i];
j++;
}
}
return classElements;
}
function roll(o)
{
var src,ftype,newsrc;
src = o.src;
ftype = src.substring(src.lastIndexOf('.'), src.length);
if(/_on/.test(src))
{
newsrc = src.replace('_on','');
}else{
newsrc = src.replace(ftype, '_on'+ftype);
}
o.src=newsrc;
}
function crear_rollover() {
if (!document.getElementsByTagName || !document.getElementById ) return false;
var myEls = getElementsByClass('rollover');
var link;
var imagenes;
for ( i=0;i<myEls.length;i++ )
{
myEls[i].onmouseover = function () {
roll(this);
}
myEls[i].onmouseout = function () {
roll(this);
}
}
}
addLoadEvent(crear_rollover);