发布于 2016-08-29 12:53:29 | 72 次阅读 | 评论: 0 | 来源: 网友投递
这里有新鲜出炉的Javascript教程，程序狗速度看过来！
JavaScript客户端脚本语言
Javascript 是一种由Netscape的LiveScript发展而来的原型化继承的基于对象的动态类型的区分大小写的客户端脚本语言，主要目的是为了解决服务器端语言，比如Perl，遗留的速度问题，为客户提供更流畅的浏览效果。
var lrc0, lrc1, lrc2;
moveflag = false;
var top, bottom;
var lrcobj;
var lrctop;
predlt = 0;
curdlt = 0;
function lrcClass(tt)
{
this.inr = [];
this.oTime = 0;
this.dts = -1;
this.dte = -1;
this.dlt = -1;
this.ddh;
this.fjh;
if(/\[offset\:(\-?\d+)\]/i.test(tt))
this.oTime = RegExp.$1/1000;
tt = tt.replace(/\[\:\][^$\n]*(\n|$)/g,"$1");
tt = tt.replace(/\[[^\[\]\:]*\]/g,"");
tt = tt.replace(/\[[^\[\]]*[^\[\]\d]+[^\[\]]*\:[^\[\]]*\]/g,"");
tt = tt.replace(/\[[^\[\]]*\:[^\[\]]*[^\[\]\d\.]+[^\[\]]*\]/g,"");
tt = tt.replace(/<[^<>]*[^<>\d]+[^<>]*\:[^<>]*>/g,"");
tt = tt.replace(/<[^<>]*\:[^<>]*[^<>\d\.]+[^<>]*>/g,"");
while(/\[[^\[\]]+\:[^\[\]]+\]/.test(tt))
{
tt = tt.replace(/((\[[^\[\]]+\:[^\[\]]+\])+[^\[\r\n]*)[^\[]*/,"\n");
var zzzt = RegExp.$1;
/^(.+\])([^\]]*)$/.exec(zzzt);
var ltxt = RegExp.$2;
var eft = RegExp.$1.slice(1,-1).split("][");
for(var ii=0; ii<eft.length; ii++)
{
var sf = eft[ii].split(":");
var tse = parseInt(sf[0],10) * 60 + parseFloat(sf[1]);
var sso = { t:[] , w:[] , n:ltxt }
sso.t[0] = Math.round((tse-this.oTime)*1000)/1000;
this.inr[this.inr.length] = sso;
}
}
this.inr = this.inr.sort( function(a,b){return a.t[0]-b.t[0];} );
for(var ii=0; ii<this.inr.length; ii++)
{
while(/<[^<>]+\:[^<>]+>/.test(this.inr[ii].n))
{
this.inr[ii].n = this.inr[ii].n.replace(/<(\d+)\:([\d\.]+)>/,"%=%");
var tse = parseInt(RegExp.$1,10) * 60 + parseFloat(RegExp.$2);
this.inr[ii].t[this.inr[ii].t.length] = Math.round((tse-this.oTime)*1000)/1000;
}
lrcbc1.innerHTML = "<font>"+ this.inr[ii].n.replace(/&/g,"&").replace(/</g,"<").replace(/>/g,">").replace(/%=%/g,"</font><font>") +" </font>";
var fall = lrcbc1.getElementsByTagName("font");
for(var wi=0; wi<fall.length; wi++)
this.inr[ii].w[this.inr[ii].w.length] = fall[wi].offsetWidth;
this.inr[ii].n = lrcbc1.innerText;
}
this.overtop = function()
{
var ii;
for(ii=this.inr.length-1; ii>0 && this.inr[ii].t[0]>ffbb; ii--){}
top = ii;
}
this.run = function(tme)
{
if(tme<this.dts || tme>=this.dte)
{
var ii;
for(ii=this.inr.length-1; ii>=0 && this.inr[ii].t[0]>tme; ii--){}
if(ii<0) return;
this.ddh = this.inr[ii].t;
this.fjh = this.inr[ii].w;
this.dts = this.inr[ii].t[0];
this.dte = (ii<this.inr.length-1)?this.inr[ii+1].t[0]:aboutplayer.currentMedia.duration;
if(!movable)
{
lrctop = 140;
lrcoll.style.pixelTop = 140;
lowlight(lrcbox1);
this.overtop();
overbottom();
for(var wi=1; wi<=this.inr.length; wi++)
{
eval("lrcbox"+wi).innerText = this.inr[wi-1].n;
eval("lrcbc"+wi).innerText = this.inr[wi-1].n;
}
movable = true;
}
if(this.dlt>0) lowcolor(eval("lrcbc"+this.dlt));
clearTimeout(lrc2);
if(this.dlt==ii-1)
{
predlt = this.dlt+1;
if(!ptms && predlt>0)
{
eval("lrcbc"+predlt).filters.alpha.opacity = 100;
eval("lrcbc"+predlt).style.width = "100%";
highcolor(0,this.dte-this.dts);
}
toposition(1,this.dte-this.dts);
}
if(ii-this.dlt>1 || ii-this.dlt<=-1)
{
if(this.dlt>=0) lowcolor(eval("lrcbc"+(this.dlt+1)));
if(this.dlt==-1 || ii==0)
{
jumpto(ii-this.dlt-1);
toposition(1,this.dte-this.dts);
}
else
jumpto(ii-this.dlt);
}
if(this.dlt>=0) lowlight(eval("lrcbox"+(this.dlt+1)));
this.dlt = ii;
curdlt = ii;
if(!drdc) highlight(eval("lrcbox"+(this.dlt+1)));
if(drdc)
{
curlowcolor(eval("lrcbc"+(this.dlt+1)));
curhighcolor(0,this.dte-this.dts);
}
}
if(klok)
{
var bbw = 0;
var ki;
for(ki=0; ki<this.ddh.length && this.ddh[ki]<=tme; ki++)
bbw += this.fjh[ki];
var kt = ki-1;
var sc = ((ki<this.ddh.length)?this.ddh[ki]:this.dte) - this.ddh[kt];
var tc = tme - this.ddh[kt];
bbw -= this.fjh[kt] - tc / sc * this.fjh[kt];
if(bbw>eval("lrcbox"+(this.dlt+1)).offsetWidth)
bbw = eval("lrcbox"+(this.dlt+1)).offsetWidth;
eval("lrcbc"+(this.dlt+1)).style.width = Math.round(bbw);
}
}
lrcbox1.innerText = "www.aboutplayer.com";
}
function overbottom()
{
if(aboutplayer.currentMedia.duration>0)
{
var ii;
for(ii=lrcobj.inr.length-1; ii>0 && lrcobj.inr[ii].t[0]-ffbb>=aboutplayer.currentMedia.duration; ii--){}
bottom = ii;
}
else
setTimeout("overbottom()",10);
}
function jumpto(nline)
{
lrctop -= 20*nline;
lrcoll.style.top = lrctop;
}
function toposition(step,dur)
{
if(moveflag) return;
lrcoll.style.top = lrctop--;
if(step<20)
{
step++;
setTimeout("toposition("+step+","+dur+");",dur*50);
}
}
function highcolor(step,dur)
{
if(moveflag) return;
eval("lrcbc"+predlt).filters.alpha.opacity = 100-(step++)*10;
if(step<10)
lrc1 = setTimeout("highcolor("+step+","+dur+");",dur*100);
}
function curhighcolor(step,dur)
{
if(moveflag) return;
eval("lrcbc"+(curdlt+1)).filters.alpha.opacity = (step++)*10;
if(step<10)
lrc2 = setTimeout("curhighcolor("+step+","+dur+");",dur*100);
}
function highlight(lid)
{
lid.style.color = "#00FF00";
}
function lowcolor(lid)
{
clearTimeout(lrc1);
lid.style.width = 0;
lid.filters.alpha.opacity = 100;
}
function curlowcolor(lid)
{
lid.filters.alpha.opacity = 0;
lid.style.width = "100%";
}
function lowlight(lid)
{
lid.style.color = "#0080C0";
}
function lrcrun(m)
{
lrcobj = new lrcClass(m);
lrc0 = setInterval("try {lrcobj.run(aboutplayer.controls.currentPosition+ffbb)} catch(hh){}",10);
}
MakeMovable(lrcollbox);
function MakeMovable(element)
{
element.attachEvent("onmousedown",onmousedown);
element.attachEvent("onmouseup",onmouseup);
element.attachEvent("onmousemove",onmousemove);
flagmove = false;
var s_y, o_y;
curpot = 0;
function onmousedown()
{
if(event.button!=1 || moveflag || !movable || !type || bottom==0) {flagmove = true; return;}
clearTimeout(lrc0);
if(curdlt>0) lowcolor(eval("lrcbc"+curdlt));
lowcolor(eval("lrcbc"+(curdlt+1)));
lowlight(eval("lrcbox"+(curdlt+1)));
if(lrcoll.style.pixelTop>120-top*20) lrcoll.style.top = 120-top*20;
if(lrcoll.style.pixelTop<120-bottom*20) lrcoll.style.top = 120-bottom*20;
s_y = event.clientY;
o_y = lrcoll.style.pixelTop;
element.style.cursor = "n-resize";
element.setCapture();
moveflag = true;
}
function onmousemove()
{
if(event.button!=1 || !moveflag || flagmove) return;
var offy = event.clientY-s_y;
if(o_y+offy<=120-top*20 && o_y+offy>=120-bottom*20) lrcoll.style.top = o_y+offy;
if(o_y+offy>120-top*20) lrcoll.style.top = 120-top*20;
if(o_y+offy<120-bottom*20) lrcoll.style.top = 120-bottom*20;
var pot = Math.floor((lrcoll.style.pixelTop-120)/-20);
if(pot!=curpot)
{
lowlight(eval("lrcbox"+(curpot+1)));
curpot = pot;
highlight(eval("lrcbox"+(curpot+1)));
}
}
function onmouseup()
{
if(!moveflag || flagmove) {flagmove = false; return;}
if(aboutplayer.playState==3)
{
if(lrcoll.style.pixelTop<=120-top*20 && lrcoll.style.pixelTop>100-top*20)
lrcobj.dte = -1;
else
lrcobj.dte = lrcobj.inr[Math.floor((lrcoll.style.pixelTop-120)/-20)-1].t[0];
if(lrcobj.inr[Math.floor((lrcoll.style.pixelTop-120)/-20)].t[0]-ffbb<0)
aboutplayer.controls.currentPosition = 0;
else
aboutplayer.controls.currentPosition = lrcobj.inr[Math.floor((lrcoll.style.pixelTop-120)/-20)].t[0]-ffbb;
lrcobj.dlt = Math.floor((lrcoll.style.pixelTop-120)/-20);
lrctop = lrcoll.style.pixelTop;
}
else
{
lowlight(eval("lrcbox"+(curpot+1)));
highlight(eval("lrcbox"+(curdlt+1)));
lrcoll.style.top = o_y;
}
lrc0 = setInterval("try {lrcobj.run(aboutplayer.controls.currentPosition+ffbb)} catch(hh){}",10);
element.releaseCapture();
element.style.cursor = "hand";
moveflag = false;
}
}