哪位大佬帮忙简化一下代码
menu_li[0].onmouseover=function()
{startMove( under_line[0],{width:100});};
menu_li[0].onmouseout=function()
{startMove( under_line[0],{width:0});};
menu_li[1].onmouseover=function()
{startMove( under_line[1],{width:100});};
menu_li[1].onmouseout=function()
{startMove( under_line[1],{width:0});};
menu_li[2].onmouseover=function()
{startMove( under_line[2],{width:100});};
menu_li[2].onmouseout=function()
{startMove( under_line[2],{width:0});};
menu_li[3].onmouseover=function()
{startMove( under_line[3],{width:100});};
menu_li[3].onmouseout=function()
{startMove( under_line[3],{width:0});};
menu_li[4].onmouseover=function()
{startMove( under_line[4],{width:100});};
menu_li[4].onmouseout=function()
{startMove( under_line[4],{width:0});};