function initPageShadow() 

{

	var bg_color = "#FFFFFF";

	var page_bottom_elem;



	if (document.getElementById) // IE5+ & Gecko

	{

		var elem = document.getElementById("body");



		if (elem.currentStyle) 

			bg_color = elem.currentStyle["backgroundColor"];

		else if (window.getComputedStyle) 

			bg_color = window.getComputedStyle(elem, "").getPropertyValue("background-color");



		page_bottom_elem = document.getElementById("page_bottom_shadow");

	}

	

	page_bottom_elem.innerHTML = providePageBottomShadow(bg_color.toString());

}



function providePageBottomShadow(bg_color)

{

	var shadow_code = "<table width=\"100%\" border=\"0\" cellspacing=\"0\" cellpadding=\"0\">";

	var gradient_colors = extractGradientColors(bg_color);



	for( var i=0; i<gradient_colors.length; i++ )

	{

		shadow_code += "<tr>";

		shadow_code += "<td width=\"100%\" height=\"1\" bgcolor=\"#"+gradient_colors[i]+"\"><img src=/""+emptyIconUrl+"/" alt=\"\"/></td>";

		shadow_code += "</tr>";

	}



	shadow_code += "</table>";

	return shadow_code;

}



// The color format is "rgb(rrr, ggg, bbb)" or "#rrggbb"

function extractRGB(color)

{

	var rgb = new stringArray(3, 0);

	

	if( color.charAt(0)=='#' )

	{

		rgb[0] = parseInt(color.substring(1, 3), 16);

		rgb[1] = parseInt(color.substring(3, 5), 16);

		rgb[2] = parseInt(color.substring(5, 7), 16);

	}

	else

	{

		var first_comma = color.indexOf(",");

		var second_comma = color.substring(first_comma+1).indexOf(",") + first_comma + 1;



		rgb[0] = parseInt(color.substring(4, first_comma));

		rgb[1] = parseInt(color.substring(first_comma+1, second_comma));

		rgb[2] = parseInt(color.substring(second_comma+1, color.indexOf(")")));

	}

	return rgb;

}



function extractGradientColors(color)

{

	var gradient_colors = new stringArray(7, '000000');

	var rgb = extractRGB(color);

	var max_red = rgb[0];

	var max_green = rgb[1];

	var max_blue = rgb[2];

	var red = 0;

	var green = 0;

	var blue = 0;



	red += max_red / 2;

	green += max_green / 2;

	blue += max_blue / 2;

	gradient_colors[1] = toHex(red) + toHex(green) + toHex(blue);



	red += max_red / 8;

	green += max_green / 8;

	blue += max_blue / 8;

	gradient_colors[2] = toHex(red) + toHex(green) + toHex(blue);

	

	red += max_red / 8;

	green += max_green / 8;

	blue += max_blue / 8;

	gradient_colors[3] = toHex(red) + toHex(green) + toHex(blue);



	red += max_red / 10;

	green += max_green / 10;

	blue += max_blue / 10;

	gradient_colors[4] = toHex(red) + toHex(green) + toHex(blue);



	red += max_red / 13;

	green += max_green / 13;

	blue += max_blue / 13;

	gradient_colors[5] = toHex(red) + toHex(green) + toHex(blue);



	red += max_red / 19;

	green += max_green / 19;

	blue += max_blue / 19;

	gradient_colors[6] = toHex(red) + toHex(green) + toHex(blue);



	return gradient_colors;

}



function stringArray(n, init)

{

	this.length = n;

	for( var i=0; i<n; i++ )

		this[i] = init;

	return this;

}



var hexchars = '0123456789ABCDEF';



function toHex(num)

{

	return hexchars.charAt(num >> 4) + hexchars.charAt(num & 0xF);

}