/* Duplicates of Prototype for main site */
var PythonEvent = {
	"observe" : function(element, eventName, handler) {
		if (element.addEventListener) {
      element.addEventListener(eventName, handler, false);
    } else if (element.attachEvent) {
      element.attachEvent("on" + eventName, handler);
    }
	},
	"stop" : function(event) {
    if (event.preventDefault) {
      event.preventDefault();
      event.stopPropagation();
    } else {
      event.returnValue = false;
      event.cancelBubble = true;
    }
	},
	"element" : function(event) {
    return event.target || event.srcElement;
  }
}

var PythonWindow = {
	"viewportHeight" : function() { 
    var height = 0;
    if (window.innerHeight) {
			height = window.innerHeight;
    }
    else if (document.documentElement) {
			height = document.documentElement.clientHeight;
    }
    else {
			height = document.body.clientHeight;
    }
    
    return height;
	},
	
	/*
	 * How far we're scrolled down the viewport
   */
	"scrollPosition" : function() {
    var scrollY, scrollX;
    
		if (self.pageYOffset) {
			scrollX = self.pageXOffset;
			scrollY = self.pageYOffset;
		}
		else if (document.documentElement && document.documentElement.scrollTop) {
			scrollX = document.documentElement.scrollLeft;
			scrollY = document.documentElement.scrollTop;
		}
		else if (document.body) {
			scrollX = document.body.scrollLeft;
			scrollY = document.body.scrollTop;
		}	
		
		return [scrollX, scrollY];
	}
}

var PythonElement = {
	"get" : function(id) {
		var element =  document.getElementById(id);

		if (element.id != id) {
			var elements = document.all[id];
			for (var i=0; i < elements.length; i++) {
				if (elements[i].id == id) {
					element = elements[i];
					break;
				}
			}
		}
		return element;
	},
	"getStyle" : function (element, property) {
		if (document.defaultView && document.defaultView.getComputedStyle) {
    	return document.defaultView.getComputedStyle(element, null)[property];
  	} 
  	else if (element.currentStyle) {
    	return element.currentStyle[property];
  	} 
  	else {
    	return element.style[property];
  	}
	}
	
}

function isIE6(){
	var agt = navigator.userAgent.toLowerCase();
	var is_major = parseInt(navigator.appVersion);
	var is_ie = ((agt.indexOf("msie") != -1) && (agt.indexOf("opera") == -1));
	return (is_ie && (is_major == 4) && (agt.indexOf("msie 6.")!=-1) );
}