function getViewportSize(){
	var size = [0,0];
	if(typeof window.innerWidth!="undefined"){
		size = [window.innerWidth,window.innerHeight];
	}else if(typeof document.documentElement != "undefined" && typeof document.documentElement.clientWidth != "undefined" && document.documentElement.clientWidth != 0){
		size = [document.documentElement.clientWidth, document.documentElement.clientHeight]; 
	}else{
		size = [document.getElementsByTagName("body")[0].clientWidth, document.getElementsByTagName("body")[0].clientHeight];
	}
	return size;
}

function createScrollBars(id,w,h){
	window.onresize=function(){
		var el = document.getElementById(id);
		var size=getViewportSize();	
		el.style.width=(size[0] < w)?w+"px":"100%";
		el.style.height=(size[1] < h)?h+"px":"100%";
	};
	window.onresize();
}