/* protoload 0.1 beta by Andreas Kalsch
 * last change: 09.07.2007
 *
 * This simple piece of code automates the creating of Ajax loading symbols.
 * The loading symbol covers an HTML element with correct position and size - example:
 * $('myElement').startWaiting() and $('myElement').stopWaiting()
 */
 
Protoload = {
	// the script to wait this amount of msecs until it shows the loading element
	timeUntilShow: 250,
	
	// opacity of loading element
	opacity: 0.6,

	// Start waiting status - show loading element
	startWaiting: function(element, className, timeUntilShow) {
		if (typeof element == 'string')
			element = document.getElementById(element);
		if (className == undefined)
			className = 'waiting';
		if (timeUntilShow == undefined)
			timeUntilShow = Protoload.timeUntilShow;
		        
		element._waiting = true;
		if (!element._loading) {
			var e = document.createElement('div');
      element._loading = e;
      element._loading.className = className;
      element.offsetParent.appendChild(e);
      // Absolutize causa problemas en IE 7
      if (Prototype.Browser.IE)
        e.style.position = 'absolute';
      else      
        e.absolutize();
      Element.clonePosition(e, element);
      //Element.remove(eNuevo);
			try {e.style.opacity = Protoload.opacity;} catch(e) {}
			try {e.style.MozOpacity = Protoload.opacity;} catch(e) {}
			try {e.style.filter = 'alpha(opacity='+Math.round(Protoload.opacity * 100)+')';} catch(e) {}
			try {e.style.KhtmlOpacity = Protoload.opacity;} catch(e) {}
		}
		window.setTimeout((function() {
			
		}).bind(element), timeUntilShow);
	},
	
	// Stop waiting status - hide loading element
	stopWaiting: function(element) {
		if (element._waiting) {
			element._waiting = false;
			element._loading.parentNode.removeChild(element._loading);
			element._loading = null;
		}
	}/*,
	
	_zIndex: 1000000*/
};

if (Prototype) {
	Element.addMethods(Protoload);
	Object.extend(Element, Protoload);
}
/* */