var nav_min_height = 285;

function nav_init() {

	nav_height_init();
	nav_shdw_init();
}


function nav_height_init() {
	nav_dv_id = 'content_nav';
	nav_dv = document.getElementById(nav_dv_id);
	
	if (nav_dv != null) {
		if (nav_dv.offsetHeight < nav_min_height) {
			spacer_dv_id = 'nav_main_spacer';
			spacer_dv = document.getElementById(spacer_dv_id);

			if (spacer_dv != null) {
				spacer_dv.style.height = (nav_min_height - nav_dv.offsetHeight) + "px";
			
			}		
			
		}
	}

}

function nav_shdw_init() {
	nav_dv_id = 'content_nav';
	nav_dv = document.getElementById(nav_dv_id);
	
	left_dv_id = 'nav_shdw_left';
	left_dv = document.getElementById(left_dv_id);
	
	right_dv_id = 'nav_shdw_right';
	right_dv = document.getElementById(right_dv_id);

	if (nav_dv != null) {
		if (left_dv != null) {
			left_dv.style.height = (nav_dv.offsetHeight + 22) + "px";
			left_dv.style.display = "block";
		}	

		if (right_dv != null) {
			right_dv.style.height = (nav_dv.offsetHeight + 22) + "px";
			right_dv.style.display = "block";
		}
	}

}