function changeDimension()
{
	arrTemp = getWindowWidth();
	newWidth = arrTemp[0];
	marginLeft =  Math.round((newWidth-630)/2);
	$('#slideshow').css("width", newWidth+'px');
	//$('#img_container').css("left", marginLeft+'px');
	$('#screen div').css('width', marginLeft+'px');

}
function getWindowWidth()
{
	var ua = navigator.userAgent.toLowerCase();
	if ( ua.indexOf( "opera" ) != -1 )
	{
		browserName = "opera";
		newWidth = $(window).width()-4;
		newMargin =  -1*(newWidth-580)/2;
	}
	else if ( ua.indexOf( "msie" ) != -1 )
	{
		browserName = "msie";
		newWidth = $(window).width()-2;
		newMargin =  -1*(newWidth-580)/2;
	}
	else if ( ua.indexOf( "safari" ) != -1 )
	{
		browserName = "safari";
		newWidth = $(window).width()-15;
		newMargin =  -1*(newWidth-580)/2;
	}
	else if ( ua.indexOf( "mozilla" ) != -1 )
	{
		if ( ua.indexOf( "firefox" ) != -1 )
		{
			browserName = "firefox";
			newWidth = $(window).width()-2;
			newMargin =  -1*(newWidth-580)/2;
		}
		else
		{
			browserName = "mozilla";
			newWidth = $(window).width()-2;
			newMargin =  -1*(newWidth-580)/2;
		}
	}
	return [newWidth, newMargin];
}