// JavaScript Document

	function getWidth(win){
    	var de = document.documentElement;
    	var width = window.innerWidth || self.innerWidth || (de&&de.clientWidth) || document.body.clientWidth;
    	return width;
	}

	function getHeight(win){
		var de = document.documentElement;
		var height = window.innerHeight || self.innerHeight || (de&&de.clientHeight) || document.body.clientHeight;
		return height;
	}
	function pxStr(value){
		return value+'px';
	}
	function scalPage(){
		document.getElementById('page').style.height = pxStr(getHeight()-50);
	}