www.pudn.com > 下拉菜单.rar > menu.js

if (document.all)    {n=0;ie=1;fShow="visible";fHide="hidden";} 
if (document.layers) {n=1;ie=0;fShow="show";   fHide="hide";} 
 
topY = 0;rightX = 0;bottomY = 0;leftX = 0; 
lastMenu = null; 
var mstyle; 
 
function MenuStyle() 
{ 
	this.bgColor     = "#008000"; 
	this.menuFont; 
	this.menuFontIE  = "bold xx-small Verdana"; 
	this.menuFontNS  = "bold x-small Verdana"; 
 
	this.clsMenuItemIE = "class=clsMenuItemIE"; 
	this.clsMenuItemNS = "class=clsMenuItemNS"; 
 
	this.mainMenuWidth = "100%"; 
 
	this.mainMenuBorder = 0; 
	this.subMenuBorder  = 0; 
	this.menuDelta = 3; 
 
	this.subMenueWidth = 100; 
 
	this.bMenuStatic = 0; 
 
	this.TranslateStyle = TranslateStyle; 
} 
 
function TranslateStyle() 
{ 
	if (n)  this.menuFont = this.menuFontNS; 
	if (ie) this.menuFont = this.menuFontIE; 
} 
 
 
function Menu(ms) 
{ 
	ms.TranslateStyle(); 
	mstyle = ms; 
 
	this.addItem    = addItem; 
	this.addSubItem = addSubItem; 
	this.showMenu   = showMenu; 
	this.displaySubMenu = displaySubMenu; 
 
 
 
	HTMLstr = ""; 
	HTMLstr += "\n"; 
	HTMLstr += "\n"; 
 
	if (ie) 
	{ 
	  if (mstyle.bMenuStatic > 0) HTMLstr += "
\n"; 
	  else HTMLstr += "
\n"; 
	} 
	if (n) 
	{ 
	  if (mstyle.bMenuStatic > 0) HTMLstr += "\n"; 
	  else  HTMLstr += "\n"; 
	} 
 
	HTMLstr += "\n"; 
	HTMLstr += "\n"; 
	HTMLstr += "
\n"; 
 
	HTMLstr += "
\n"; 
	HTMLstr += "\n"; 
	HTMLstr += "\n"; 
	HTMLstr += "\n"; 
	HTMLstr += "
\n"; 
 
	HTMLstr += "
\n"; 
 
	if (ie) HTMLstr+= "
\n"; 
	if (n) 
	{ 
	  if (mstyle.bMenuStatic > 0) HTMLstr+= "\n"; 
	  else HTMLstr+= "\n"; 
	} 
	HTMLstr += "\n"; 
	HTMLstr += "\n"; 
	HTMLstr += "\n"; 
	HTMLstr += "\n"; 
	HTMLstr += "\n"; 
 
	HTMLstr += "\n"; 
} 
 
function addItem(idItem, text, hint, location, altLocation) 
{ 
	var Lookup = ""; 
	if (HTMLstr.indexOf(Lookup) != -1) 
	{ 
		alert(idParent + " already exist"); 
		return; 
	} 
	var MENUitem = ""; 
	MENUitem += "\n\n"; 
	if (n) 
	{ 
		MENUitem += "\n"; 
		MENUitem += ""; 
		if (location == null) 
			MENUitem += ""; 
		else  
			MENUitem += ""; 
		MENUitem += " | "; 
		MENUitem += text; 
		MENUitem += ""; 
		MENUitem += ""; 
		MENUitem += "\n"; 
	} 
	if (ie) 
	{ 
		MENUitem += "\n"; 
		MENUitem += "
\n"; 
		MENUitem += "\n"; 
		MENUitem += "
\n"; 
		MENUitem += "\n"; 
	} 
	MENUitem += "\n\n"; 
	MENUitem += "\n"; 
 
	HTMLstr = HTMLstr.replace("\n", MENUitem); 
} 
 
function addSubItem(idParent, text, hint, location, frame) 
{ 
	var MENUitem = ""; 
	Lookup = ""; 
	if (HTMLstr.indexOf(Lookup) == -1) 
	{ 
		alert(idParent + " not found"); 
		return; 
	} 
	Lookup = ""; 
	if (HTMLstr.indexOf(Lookup) == -1) 
	{ 
		if (n) 
		{ 
			MENUitem += "\n"; 
			MENUitem += "\n"; 
			MENUitem += "\n"; 
			MENUitem += "\n"; 
			MENUitem += "\n"; 
			MENUitem += "\n"; 
			MENUitem += "\n"; 
		} 
		if (ie) 
		{ 
			MENUitem += "\n"; 
			MENUitem += "
\n"; 
			MENUitem += "\n"; 
			MENUitem += "\n"; 
			MENUitem += "\n"; 
			MENUitem += "
\n"; 
			MENUitem += "\n"; 
		} 
		MENUitem += "\n"; 
		HTMLstr = HTMLstr.replace("\n", MENUitem); 
	} 
 
	Lookup = "\n"; 
	if (n) 
        { 
	  MENUitem = "
\n"; 
        } 
	if (ie) 
        { 
	  MENUitem = "
\n"; 
        } 
	MENUitem += Lookup; 
	HTMLstr = HTMLstr.replace(Lookup, MENUitem); 
} 
 
function showMenu() 
{ 
	document.writeln(HTMLstr); 
	if (mstyle.bMenuStatic > 0) UpdateIt(); 
} 
 
//////////////////////////////////////////////////////////////////////////// 
// Private declaration 
function displaySubMenu(idMainMenu) 
{ 
	var menu; 
	var submenu; 
	if (n) 
	{ 
		submenu = document.layers[idMainMenu+"submenu"]; 
		smp = document.layers["SmartMenu"].document.layers["SmartMenuPane"]; 
 
		submenu.left = smp.document.layers[idMainMenu].pageX; 
		submenu.top  = document.layers["SmartMenu"].pageY+smp.clip.height+3; 
		submenu.visibility = fShow; 
 
		leftX  = submenu.left; 
		rightX = leftX + submenu.clip.width; 
 
		topY    = document.layers["SmartMenu"].pageY; 
		bottomY = topY+document.layers["SmartMenu"].clip.height+submenu.clip.height; 
	} else if (ie) { 
		menu = eval(idMainMenu); 
		submenu = eval(idMainMenu+"submenu.style"); 
		smp = document.all["SmartMenu"]; 
 
		submenu.left = calculateSumOffset(menu, 'offsetLeft'); 
		submenu.top = calculateSumOffset(document.all["SmartMenu"], 'offsetTop')+smp.offsetHeight+mstyle.menuDelta; 
		submenu.visibility = fShow; 
 
		leftX  = document.all[idMainMenu+"submenu"].style.posLeft; 
		rightX = leftX + document.all[idMainMenu+"submenu"].offsetWidth; 
 
		topY    = document.all["SmartMenu"].offsetTop; 
		bottomY = topY+document.all["SmartMenu"].offsetHeight+ 
				document.all[idMainMenu+"submenu"].offsetHeight; 
	} 
	lastMenu = submenu; 
} 
 
function hideAll() 
{ 
	if (lastMenu != null) {lastMenu.visibility = fHide;lastMenu.left = 0;} 
} 
 
function calculateSumOffset(idItem, offsetName) 
{ 
	var totalOffset = 0; 
	var item = eval('idItem'); 
	do 
	{ 
		totalOffset += eval('item.'+offsetName); 
		item = eval('item.offsetParent'); 
	} while (item != null); 
	return totalOffset; 
} 
 
function updateIt(e) 
{ 
	if (ie) 
	{ 
		var x = window.event.clientX; 
		var y = window.event.clientY+document.body.scrollTop; 
 
		if (x > rightX || x < leftX) hideAll(); 
		else if (y < topY || y > bottomY) hideAll(); 
	} 
	if (n) 
	{ 
		var x = e.pageX; 
		var y = e.pageY; 
 
		if (x > rightX || x < leftX) hideAll(); 
		else if (y > bottomY || y < topY) hideAll(); 
	} 
} 
 
function UpdateIt() 
{ 
  if (ie) document.all["SmartMenu"].style.top = document.body.scrollTop; 
  if (n)  document.layers["SmartMenu"].top    = top.pageYOffset; 
  setTimeout("UpdateIt()", 200); 
} 
 
 
if (document.all) 
{ 
	document.body.onclick=hideAll; 
	document.body.onscroll=hideAll; 
	document.body.onmousemove=updateIt; 
} 
if (document.layers) 
{ 
	document.onmousedown=hideAll; 
	window.captureEvents(Event.MOUSEMOVE); 
	window.onmousemove=updateIt; 
}