function setHeight(hg){
	if(window.screen){		
		hg = window.screen.availHeight*0.85;
	}
	return hg;
}

function setWidthCenter(hw){
	var x = (800 - hw);
	if (screen) {	x = (screen.availWidth - hw); }
	return x * 0.5;
}

function setHeightCenter(hg){
	var y = (600 - hg);
	if (screen) {	y = (screen.availHeight - hg); }
	return y * 0.4;
}