function resize() {
	if (window.XMLHttpRequest) {
		var de = parseInt(document.documentElement.scrollHeight);
		//alert(de);
		document.getElementById('contentbackgr').style.height = (de-125) + 'px';
		document.getElementById('contentmain').style.height = (de-125) + 'px';
	} else {
		var by = parseInt(document.body.scrollHeight);
		//alert(by);
		document.getElementById('contentbackgr').style.height = (by-125) + 'px';
		document.getElementById('contentmain').style.height = (by-125) + 'px';
	}
}