x_alt.js

一个用jsp写的完整的论坛源代码

<!--
/*
@ JavaScript X-Alt 2.0b 
@ 作者：Andyfoo
@ 功能：提示工具条
@ 日期：2005-5-1(make)/2005-8-28(change)/2005-9-10(change)/2005-9-14(change)
@ 网址：http://www.getcn.net	http://www.andyfoo.net
@ 版权：算法之家(http://www.getcn.net)版权所有
@ 电邮：[e-mail]
@ QQ号：93638025
@################################
@ 欢迎批评指正本程序的错误。本程序免费使用，请保留本作者的版权信息。谢谢！！！
@################################
*/
var cfg_fade_switch=true;       
var cfg_xoffset=9;         
var cfg_yoffset=20;        
var cfg_mouse_follow=true;
var cfg_hide_delay=3000;    
var cfg_txt_tag='alt';
var cfg_is_show=true;
var cfg_tags = new Array("select","a","area","b","big","caption","center","code","dd","div","dl","dt","em","h1","h2","h3","h4","h5","h6","i","img","input","li","map","ol","p","pre","s","small","span","strike","strong","sub","sup","table","td","th","tr","tt","u","var","ul","layer");

document.write("<style>.navtext_div{PADDING-RIGHT: 6px; PADDING-LEFT: 6px;PADDING-TOP: 2px; PADDING-BOTTOM: 1px; FONT-SIZE: 12px; Z-INDEX: 99; VISIBILITY: hidden; COLOR: #333333; BORDER: 1px #8899AA dashed;FONT-FAMILY: Courier New,tahoma,arial; POSITION: absolute; BACKGROUND-COLOR: #FFFFCC;}</style>");
document.write('<div id="navtext_div" class="navtext_div" style="visibility:hidden; position:absolute; top:0px; left:-400px; z-index:10000; padding:3px"></div>');

function xalt_props(){
	this.w3c=(document.getElementById)?true:false;
	this.ns4=(document.layers)?true:false;
	this.ie4=(document.all && !this.w3c)?true:false;
	this.ie5=(document.all && this.w3c)?true:false;
	this.ns6=(this.w3c && navigator.appName.indexOf("Netscape")>=0 )?true:false;
	this.w_y=0;
	this.w_x=0;
	this.navtxt=null;
	this.boxheight=0;
	this.boxwidth=0;
	this.ishover=true;
	this.ieop=0;
	this.op_id=0;
	this.oktomove=true;
	this.dy=0;
}
function xalt_kill_errors() {
	return true;
}

var XALT=new xalt_props();

function xalt_set_mouse_follow(mouse_follow){//true or false
	cfg_mouse_follow=mouse_follow;
}

function xalt_set_fade_switch(fade_switch){//true or false
	cfg_fade_switch=fade_switch;
	if(!cfg_fade_switch)XALT.ieop=100;
}

function xalt_get_window_dims(){
	XALT.w_y=(XALT.ie5||XALT.ie4)?document.body.clientHeight:window.innerHeight;
	XALT.w_x=(XALT.ie5||XALT.ie4)?document.body.clientWidth:window.innerWidth;
}

function xalt_get_box_width(){
	if(XALT.ns4)XALT.boxwidth=(XALT.navtxt.document.width)? XALT.navtxt.document.width : XALT.navtxt.clip.width;
	else if(XALT.ie4)XALT.boxwidth=(XALT.navtxt.style.pixelWidth)? XALT.navtxt.style.pixelWidth : XALT.navtxt.offsetWidth;
	else XALT.boxwidth=(XALT.navtxt.style.width)? parseInt(XALT.navtxt.style.width) : parseInt(XALT.navtxt.offsetWidth);
}

function xalt_get_box_height(){
	if(XALT.ns4)XALT.boxheight=(XALT.navtxt.document.height)? XALT.navtxt.document.height : XALT.navtxt.clip.height;
	else if(XALT.ie4)XALT.boxheight=(XALT.navtxt.style.pixelHeight)? XALT.navtxt.style.pixelHeight : XALT.navtxt.offsetHeight;
	else XALT.boxheight=parseInt(XALT.navtxt.offsetHeight);
}

function xalt_move_nav_txt(x,y){
	if(XALT.ns4){
		XALT.navtxt.moveTo(x,y);
	}else{
		XALT.navtxt.style.left=x+'px';
		XALT.navtxt.style.top=y+'px';
	}
}

function xalt_get_page_scrolly(){
	if(XALT.ie5||XALT.ie4){
		if(document.documentElement.scrollTop > 0) return document.documentElement.scrollTop;
		return document.body.scrollTop;
	}else return window.pageYOffset;
}

function xalt_get_page_scrollx(){
	if(XALT.ie5||XALT.ie4){
		if(document.documentElement.scrollLeft > 0) return document.documentElement.scrollLeft;
		return document.body.scrollLeft;
	}else return window.pageXOffset;
}

function xalt_write_in_div(text){
	if(XALT.ns4){
		XALT.navtxt.document.open();
		XALT.navtxt.document.write(text);
		XALT.navtxt.document.close();
	}
	else XALT.navtxt.innerHTML=text;
}

function xalt_write_txt(text){
	if(cfg_fade_switch && (XALT.ie4||XALT.w3c))clearInterval(XALT.op_id);
	if(text!=0 && cfg_is_show ){
		if(!cfg_mouse_follow)clearTimeout(XALT.dy);
		XALT.oktomove=true;
		XALT.ishover=true;
		if(XALT.ns4)text='<div class="navtext_div">'+text+''+'</div>';
		if(XALT.w3c||XALT.ie4)XALT.navtxt.style.textAlign="left";
		xalt_write_in_div(text);
		if(XALT.ns4)XALT.navtxt.visibility="show";
		else{
			//XALT.navtxt.style.display="inline";
			XALT.navtxt.style.visibility="visible";
		}
		xalt_get_box_height();
		if((XALT.w3c||XALT.ie4) && cfg_fade_switch){
			if(XALT.ie4||XALT.ie5)XALT.navtxt.style.filter="alpha(opacity=0)";
			if(XALT.ns6)XALT.navtxt.style.MozOpacity=0;
			XALT.ieop=0;
			XALT.op_id=setInterval('xalt_do_opacity()',10);
		}
		cfg_is_show=false;
	}else{
		cfg_is_show=true;
		if(cfg_mouse_follow)xalt_hide_alt_txt();
		else XALT.dy=setTimeout('xalt_hide_alt_txt()',cfg_hide_delay);
	}
}

function xalt_hide_alt_txt(){
	if(XALT.ns4)XALT.navtxt.visibility="hide";
	else{
		//XALT.navtxt.style.display="none";
		XALT.navtxt.style.visibility="hidden";
	}
	xalt_move_nav_txt(-XALT.boxwidth-10,0);
	xalt_write_in_div('');
}

function xalt_do_opacity(){
	if(XALT.ieop<=100){
	XALT.ieop+=32;
	if(XALT.ie4||XALT.ie5)XALT.navtxt.style.filter="alpha(opacity="+XALT.ieop+")";
	if(XALT.ns6)XALT.navtxt.style.MozOpacity=XALT.ieop/100;
	}else clearInterval(XALT.op_id);
}

function xalt_move_obj(evt){
	mx=(XALT.ie5||XALT.ie4)?event.clientX:evt.pageX;
	my=(XALT.ie5||XALT.ie4)?event.clientY:evt.pageY;
	if(XALT.ishover && XALT.oktomove){
		margin=(XALT.ie4||XALT.ie5)?5:25;
		if(XALT.ns6)if(document.height+27-window.innerHeight<0)margin=15;
		if(XALT.ns4)if(document.height-window.innerHeight<0)margin=10;
		if(XALT.ns4||XALT.ns6)mx-=xalt_get_page_scrollx();
		if(XALT.ns4)my-=xalt_get_page_scrolly();
		xoff=mx+cfg_xoffset;
		yoff=(my+XALT.boxheight+cfg_yoffset-((XALT.ns6)?xalt_get_page_scrolly():0)>=XALT.w_y)? -5-XALT.boxheight-cfg_yoffset: cfg_yoffset;
		xalt_move_nav_txt( Math.min(XALT.w_x-XALT.boxwidth-margin , Math.max(2,xoff))+xalt_get_page_scrollx(), my+yoff+((!XALT.ns6)?xalt_get_page_scrolly():0));
		if(!cfg_mouse_follow)XALT.oktomove=false;
	}
}
function xalt_ns4_tags(tag_type, t_d, t_y){
	t_d = t_d || document;
	t_y = t_y || new Array();
	var t_x = (tag_type=="a")? t_d.links : t_d.layers;
	for(var z = t_x.length; z--;) t_y[t_y.length] = t_x[z];
	for(var z = t_d.layers.length; z--;) t_y = xalt_ns4_tags(tag_type, t_d.layers[z].document, t_y);
	return t_y;
}

function xalt_onload(){
	window.onerror = xalt_kill_errors;
	if (!(XALT.w3c || XALT.ns4 || XALT.ie4 || XALT.ie5 || XALT.ns6)) return;
	if(XALT.ns4||XALT.ns6){
		window.document.captureEvents(Event.MOUSEMOVE);
		window.document.addEventListener("mousemove", xalt_move_obj, true);
		window.document.addEventListener("resize", xalt_get_window_dims, true);
	}else if(XALT.ie4||XALT.ie5||XALT.w3c){
		window.document.attachEvent("onmousemove", xalt_move_obj);
		window.document.attachEvent("onresize", xalt_get_window_dims);
	}
	XALT.navtxt=(XALT.ns4)?document.layers['navtext_div']:(XALT.ie4)?document.all['navtext_div']:(XALT.w3c)?document.getElementById('navtext_div'):null;
	xalt_get_box_width();
	xalt_get_box_height();
	xalt_get_window_dims();
	if(XALT.ie4||XALT.ie5&&cfg_fade_switch)XALT.navtxt.style.filter="alpha(opacity=100)";
	var i = cfg_tags.length, tags; 
	while(i--){
		tags = (XALT.ie4 || XALT.ie5) ? (document.all.tags(cfg_tags[i]) || 1)
			: document.getElementsByTagName? (document.getElementsByTagName(cfg_tags[i]) || 1)
			: (!XALT.ns4 && cfg_tags[i]=="a")? document.links
			: 1;
		if (XALT.ns4 && (cfg_tags[i] == "a" || cfg_tags[i] == "layer")) tags = xalt_ns4_tags(cfg_tags[i]);
		var j = tags.length; 
		while(j--){
			var txt = tags[j].getAttribute(cfg_txt_tag);
			if (tags[j].alt) tags[j].alt = "";
			if (tags[j].title) tags[j].title = "";
			if(txt != null && txt != ''){
				tags[j].setAttribute('xalt_txt', txt);
				tags[j].setAttribute(cfg_txt_tag, '');
				tags[j].onmouseover = function() {
					xalt_write_txt(this.getAttribute('xalt_txt'));
					if(!cfg_mouse_follow)XALT.dy=setTimeout('xalt_hide_alt_txt()',cfg_hide_delay);
				}
				tags[j].onmouseout = function() {
					xalt_write_txt(0); 
					if(!cfg_mouse_follow)clearTimeout(XALT.dy);
				}

			} 
		}
	}
}

if(XALT.ns4||XALT.ns6){
	window.addEventListener("load", xalt_onload, true);
}else if(XALT.ie4||XALT.ie5||XALT.w3c){
	window.attachEvent("onload", xalt_onload);
}
//-->