(function(){
	try{
		var D = YAHOO.util.Dom;
		var headHeight = D.get("head").offsetHeight;
		var bodyHeight = D.get("body").offsetHeight;
		var footHeight = D.get("foot").offsetHeight;
		var screenSize = D.getViewportHeight(),docSize = headHeight+bodyHeight+footHeight;
		if(docSize < screenSize){
			var mainPB = parseInt(D.getStyle("main","padding-bottom"));
//			D.setStyle("main","padding-bottom",
//				screenSize-headHeight-bodyHeight-footHeight+mainPB+"px"
//			);
			var mainH = D.get("main").offsetHeight;
			D.setStyle("main","height",
				screenSize-headHeight-bodyHeight-footHeight+mainH-mainPB+"px"
			);
		}
	}catch(e){
	}
})();