function show_nav(input_name){
	nav_array = new Array('index', 'projects', 'services', 'contact_sales', 'contact_service');
	out_array = new Array();
	img_array = new Array();

	if (input_name =='index'){
		document.write('<td><img src="gfx/nav_left.gif" width="381" height="50" border="0"></td>');
	} else {
		document.write('<td><img src="gfx/nav_left_blank.gif" width="381" height="50" border="0"></td>');
	}

	for (i = 0; i < nav_array.length; i++){
		if (input_name == nav_array[i]){
			out_array[i] = nav_array[i] + '_on';
			img_array[i] = nav_array[i] + '_on';
		} else {
			out_array[i] = nav_array[i] + '_off';
			img_array[i] = nav_array[i] + '_off';
		}

		var target = ' target="_top"';
		var link = nav_array[i] + '.html';

		if (input_name == nav_array[i]){
			document.write('<td><img src="gfx/nav_' + img_array[i] + '.gif" name="' + nav_array[i] + '" height="50" border=0></td>');
		} else {
			document.write('<td><a href="' + link + '" ONMOUSEOVER="imageChange(\'nav_' + nav_array[i] + '_on.gif\', \'' + nav_array[i] + '\')" ONMOUSEOUT="imageChange(\'nav_' + out_array[i] + '.gif\', \'' + nav_array[i] + '\')" ' + target + '><img src="gfx/nav_' + img_array[i] + '.gif" name="' + nav_array[i] + '" height="50" border=0></a></td>');
		}
	}
}