//下拉菜单相关代码 var h; var w; var l; var t; var topmar = 1; var leftmar = -2; var space = 1; var isvisible; var menu_shadow_color='#999999';//定义下拉菜单阴影色 var global = window.document global.fo_currentmenu = null global.fo_shadows = new array function hidemenu() { var mx; var my; var vdiv; var mdiv; if (isvisible == true) { vdiv = document.all("menudiv"); mx = window.event.clientx + document.body.scrollleft; my = window.event.clienty + document.body.scrolltop; if ((mx < parseint(vdiv.style.left)) || (mx > parseint(vdiv.style.left)+vdiv.offsetwidth) || (my < parseint(vdiv.style.top)-h) || (my > parseint(vdiv.style.top)+vdiv.offsetheight)){ vdiv.style.visibility = "hidden"; isvisible = false; } } } function showmenu(vmnucode,twidth) { vsrc = window.event.srcelement; vmnucode = ""; h = vsrc.offsetheight; w = vsrc.offsetwidth; l = vsrc.offsetleft + leftmar+4; t = vsrc.offsettop + topmar + h + space-2; vparent = vsrc.offsetparent; while (vparent.tagname.touppercase() != "body") { l += vparent.offsetleft; t += vparent.offsettop; vparent = vparent.offsetparent; } menudiv.innerhtml = vmnucode; menudiv.style.top = t; menudiv.style.left = l; menudiv.style.visibility = "visible"; isvisible = true; makerectangulardropshadow(submenu, menu_shadow_color, 4) } function makerectangulardropshadow(el, color, size) { var i; for (i=size; i>0; i--) { var rect = document.createelement('div'); var rs = rect.style rs.position = 'absolute'; rs.left = (el.style.posleft + i) + 'px'; rs.top = (el.style.postop + i) + 'px'; rs.width = el.offsetwidth + 'px'; rs.height = el.offsetheight + 'px'; rs.zindex = el.style.zindex - i; rs.backgroundcolor = color; var opacity = 1 - i / (i + 1); rs.filter = 'alpha(opacity=' + (100 * opacity) + ')'; el.insertadjacentelement('afterend', rect); global.fo_shadows[global.fo_shadows.length] = rect; } }