img_button= new Array();
img_button[0]= new Image();
img_button[0].src= "/images/mtm/arrow_bg_on.gif";
img_button[1]= new Image();
img_button[1].src= "/images/mtm/arrow_bg_off.gif";
img_button[2]= new Image();
img_button[2].src= "/images/mtm/button_bg_on.gif";
img_button[3]= new Image();
img_button[3].src= "/images/mtm/button_bg_off.gif";
img_arrow= new Array();
img_arrow["dn"]= new Image();
img_arrow["dn"].src= "/images/mtm/arrow_dn.gif";
img_arrow["up"]= new Image();
img_arrow["up"].src= "/images/mtm/arrow_up.gif";

function change_left_menu(num, action) {
	switch (action) {
		case 1:
			document.getElementById('menu_left_td_arrow_'+ num).style.backgroundImage= "url("+ img_button[0].src+ ")";
			document.getElementById('menu_left_td_button_'+ num).style.backgroundImage= "url("+ img_button[2].src+ ")";
			break;
		default:
			document.getElementById('menu_left_td_arrow_'+ num).style.backgroundImage= "url("+ img_button[1].src+ ")";
			document.getElementById('menu_left_td_button_'+ num).style.backgroundImage= "url("+ img_button[3].src+ ")";
	}
}

function show_children(parent) {
	if (document.getElementById("arrow_"+ parent).src== img_arrow["dn"].src) {
		document.getElementById("arrow_"+ parent).src= img_arrow["up"].src;
	}
	else {
		document.getElementById("arrow_"+ parent).src= img_arrow["dn"].src;
	}
	if (document.getElementById("children_"+ parent).style.display== "none") {
		document.getElementById("children_"+ parent).style.display= "block";
	}
	else {
		document.getElementById("children_"+ parent).style.display= "none";
	}
}