Object.extend(Element, {
	setWidth: function(element,w) {
	   	element = $(element);
    	element.style.width = w +"px";
	},
	setHeight: function(element,h) {
   		element = $(element);
    	element.style.height = h +"px";
	},
	setTop: function(element,t) {
	   	element = $(element);
    	element.style.top = t +"px";
	},
	setLeft: function(element,t) {
	   	element = $(element);
    	element.style.left = t +"px";
	},
	setSrc: function(element,src) {
    	element = $(element);
    	element.src = src; 
	},
	setHref: function(element,href) {
    	element = $(element);
    	element.href = href; 
	},
	setInnerHTML: function(element,content) {
		element = $(element);
		element.innerHTML = content;
	},
	showIf : function() {
  		for(var i = 0; i < arguments.length; i++ ) {
    		var element = $(arguments[i])
    		if(element) Element.setStyle(element, {display:'block'});
  		}
	},
	hideIf : function() {
  		for(var i = 0; i < arguments.length; i++ ) {
			var element = $(arguments[i])
    		if(element) Element.setStyle(element, {display:'none'});
  		}
	}
});

function getPageDimensions(parent){
	parent = parent || document.body;              
	var windowWidth, windowHeight;
	var pageHeight, pageWidth;
	
	if (parent != document.body) {
		windowWidth = parent.getWidth();
		windowHeight = parent.getHeight();
		pageWidth = parent.scrollWidth;
		pageHeight = parent.scrollHeight;
	} else {
		var xScroll, yScroll;
		
		var scrollX =  window.pageXOffset 
		        || document.documentElement.scrollLeft
                || document.body.scollLeft
                || 0;
    	
    	var scrollY =  window.pageYOffset
                || document.documentElement.scrollTop
                || document.body.scrollTop
                || 0;
		
		if (window.innerHeight && window.scrollMaxY) {
			xScroll = document.body.scrollWidth;
			yScroll = window.innerHeight + window.scrollMaxY;
		} else if (document.body.scrollHeight > document.body.offsetHeight){ // all but Explorer Mac
			xScroll = document.body.scrollWidth;
			yScroll = document.body.scrollHeight;
		} else { // Explorer Mac...would also work in Explorer 6 Strict, Mozilla and Safari
			xScroll = document.body.offsetWidth;
			yScroll = document.body.offsetHeight;
		}
		
		if (self.innerHeight) {// all except Explorer
			windowWidth = self.innerWidth;
			windowHeight = self.innerHeight;
		} else if (document.documentElement && document.documentElement.clientHeight) { // Explorer 6 Strict Mode
			windowWidth = document.documentElement.clientWidth;
			windowHeight = document.documentElement.clientHeight;
		} else if (document.body) { // other Explorers
			windowWidth = document.body.clientWidth;
			windowHeight = document.body.clientHeight;
		}
		
		// for small pages with total height less then height of the viewport
		if(yScroll < windowHeight){
			pageHeight = windowHeight;
		} else { 
			pageHeight = yScroll;
		}
		
		// for small pages with total width less then width of the viewport
		if(xScroll < windowWidth){
			pageWidth = windowWidth;
		} else {
			pageWidth = xScroll;
		}
	} 
	return {pageWidth: pageWidth ,pageHeight: pageHeight , windowWidth: windowWidth, windowHeight: windowHeight, scrollX:scrollX, scrollY:scrollY};
}