/*
	Zoom by scaling font size
	Usage: zoomFontSize(n) - Sets font size to n%
*/
function zoomFontSize(percent)
{
    var fontSize = document.body.style.fontSize;
    if(fontSize == '' || percent == 0)
    	fontSize = '0.7';
		
    var newSize = parseFloat(fontSize) + parseFloat(percent);
	
	if (newSize >= 0.5 && newSize <= 1) 
	{
    	document.body.style.fontSize = newSize + 'em';
    	if (typeof(adjustContentDimensions) == 'function')
    		adjustContentDimensions();
	}
}