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📄 mousefire.htm

📁 JavaScript编程实例3
💻 HTM
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<html>
<head>
  <title>
    鼠标焰火
  </title>
  
  <script language="JavaScript">
  <!-- Begin
    var ver = navigator.appVersion;//获得浏览器的版本号
    var dom = document.getElementById ? 1 : 0;//判断浏览器是否是IE5.5版本以上,Netscape版本5.5以上
    var ie5 = (ver.indexOf("MSIE 5") > -1 && dom) ? 1 : 0;//判断是否ie5.0版本以上
    var n = (document.layers);//判断是否Netscape浏览器
    var ie = (document.all);//判断是否IE浏览器

    var sparksAflyin = 0;//判断是否目前正在显示焰火效果
    var totalSparks = 0;//完成一次显示的焰火文字数目
    var sparksOn = 1;//设置是否显示焰火效果
    
    //设置onMousedown事件的处理函数为自定义的mousedown函数
    function initMouseEvents() 
    {
      document.onmousedown = mouseDown;
      if(n) 
        document.captureEvents(Event.MOUSEDOWN | Event.MOUSEMOVE);
    }

    //鼠标移动事件的处理函数
    function mouseDown(e) 
    {
      if(sparksOn) //如果显示焰火效果
      {
        var mousex = (n)? e.pageX : event.x+document.body.scrollLeft;//获得鼠标的横坐标
        var mousey = (n)? e.pageY : event.y+document.body.scrollTop;//获得鼠标的纵坐标
        if(!sparksAflyin) //如果当前没有焰火效果,则显示焰火效果
        {
          for(var k = 0; k <= 9; k++)//显示所有的焰火文字
            eval('SHOW("sDiv'+k+'")');
          sparksAflyin = 1;//设置目前处于焰火效果状态
          totalSparks = 0;//目前完成一次显示效果的文字数目为0
          for(i = 0;i <= 9; i++)
            eval('moveTo('+i+',0,'+mousex+','+mousey+')');//进入实现焰火效果的处理函数
        }
      }
    }
    
    //焰火效果的处理函数
    //i指定第几个焰火文字,j指定这个焰火文字所处的第几个位置(我们给每个焰火文字设定了路径,也就是说,若干个不同的位置),mousex和mousey则是鼠标的位置
    function moveTo(i,j, mousex, mousey)
    {
      if(j < eval('anim_'+i+'_x.length'))//如果焰火文字的路径未结束,也就是没有到达终点位置
      {
        var tempx = eval('anim_'+i+'_x[j]+mousex');//给出焰火文字的下一个位置的横坐标
        var tempy = eval('anim_'+i+'_y[j]+mousey');//给出焰火文字的下一个位置的纵坐标
        if(ie) //如果是IE浏览器
        {
          if((tempy+30)>(document.body.offsetHeight+document.body.scrollTop))//如果焰火文字的位置过于靠近浏览的窗口区下边沿
            tempy = document.body.offsetHeight+document.body.scrollTop-30;//则给它设定一个极限位置
          if((tempx+30)>(document.body.offsetWidth+document.body.scrollLeft))//如果焰火文字的位置过于靠近浏览的窗口区右边沿
            tempx = document.body.offsetWidth+document.body.scrollLeft-30;//则给它设定一个极限位置
          eval('document.all.sDiv'+i+'.style.left = tempx;');//设定焰火文字的位置的横坐标
          eval('document.all.sDiv'+i+'.style.top = tempy;');//设定焰火文字的位置的纵坐标
        }
        if(n) //如果是Netscape浏览器
        {
          //设置焰火文字的位置
          eval('document.layers.sDiv'+i+'.left = tempx;');
          eval('document.layers.sDiv'+i+'.top = tempy;');
        }
        j++;//开始下一轮设定焰火文字的位置
        setTimeout("moveTo("+i+","+j+","+mousex+","+mousey+")",50)//循环定时器,设置焰火文字的下一轮显示,间隔时间是50毫秒
      }
      else //如果焰火文字已经到达了它的终点位置,也就是说,本次焰火效果展示以结束
      { 
        eval('HIDE("sDiv'+i+'")');//隐藏该焰火文字
        totalSparks++;//完成显示的焰火文字数目加1
      }
      if(totalSparks == 10) //如果完成显示的焰火文字数目为10,也就是说,本次显示已经全部完成
      {
        //变量复位
        sparksAflyin = 0;//则设置焰火效果不在进行中
        totalSparks = 0;//完成显示的焰火文字数目为0
      }
    }
    
    //显示某个焰火文字的容器
    function SHOW(divName)
    {
      if(document.all)//IE浏览器
        eval('document.all.'+divName+'.style.visibility = "visible";');//显示相应的容器
      else if(document.layers)//NetScape浏览器
        eval('document.layers["'+divName+'"].visibility = "visible";');
    }
    
    //隐藏某个焰火文字的容器
    function HIDE(divName)
    {
      if(document.all)//IE
        eval('document.all.'+divName+'.style.visibility = "hidden";');//隐藏
      else if(document.layers)//Netscape
        eval('document.layers["'+divName+'"].visibility = "hide";');//隐藏
    }
    
    //设置每个焰火文字的路径,它们由12个位置组成,数值的含义是离鼠标当前位置的距离
    anim_0_x=new Array(20,20,10,0,0,0,0,0,0,0,0,0);
    anim_0_y=new Array(-20,-40,-60,-80,-60,-40,-20,0,20,40,60,80);
    anim_1_x=new Array(20,20,17,36,60,78,90,92,93,98,108,120,133,152,181);
    anim_1_y=new Array(-20,-20,-33,-38,-38,-27,-2,25,51,84,113,141,162,212,253);
    anim_2_x=new Array(20,20,2,3,4,5,6,7,8,9,10,12,13,15,18);
    anim_2_y=new Array(-20,-20,-33,-38,-38,-27,-2,25,51,84,113,141,162,212,253);
    anim_3_x=new Array(-20,-20,-2,-1,7,10,18,35,60,102,94,94,93,97,108,111,117,127);
    anim_3_y=new Array(-20,-25,-64,-89,-104,-150,-173,-197,-213,-199,-151,-101,-66,-17,27,87,140,189);
    anim_4_x=new Array(-20,-20,-10,-39,-30,-69,-64,-138,-154,-200,-181,-209,-191,-207,-203,-213,-202,-221,-211);
    anim_4_y=new Array(-20,-20,-28,-51,-79,-100,-135,-154,-193,-183,-149,-134,-89,-60,8,51,107,157,201);
    anim_5_x=new Array(-20,-29,-51,-72,-105,-133,-164,-189,-209,-229,-247,-270,-279,-282,-283,-283,-285,-286,-288);
    anim_5_y=new Array(-20,-55,-86,-116,-154,-183,-205,-217,-217,-198,-169,-120,-44,-8,40,87,144,190,248);
    anim_6_x=new Array(-20,-20,-7,14,44,79,143,186,217,226,234,244,250,259,265,274);
    anim_6_y=new Array(-20,-21,-72,-113,-139,-166,-188,-181,-126,-68,-3,54,134,187,215,257);
    anim_7_x=new Array(20,20,-3,-9,-13,-27,-33,-44,-54,-66,-77,-95,-107,-136,-150,-160,-164,-168,-171,-172,-172,-176,-175);
    anim_7_y=new Array(-20,-26,-43,-63,-89,-116,-145,-169,-201,-222,-240,-253,-254,-245,-220,-195,-160,-124,-81,-53,-26,19,68);
    anim_8_x=new Array(-20,20,-35,39,0,45,-1,24,-15,14,-20,35,-18,38,-11,16,49,64,81,93,100,103,109);
    anim_8_y=new Array(-20,-20,-32,-42,-62,-76,-89,-107,-132,-147,-173,-180,-192,-209,-236,-193,-119,-73,-24,51,95,130,188);
    anim_9_x=new Array(-20,-51,-89,-110,-165,-191,-228,-240,-259,-271,-277,-281,-287);
    anim_9_y=new Array(-20,-20,-35,-37,-34,-16,10,47,105,150,189,227,273);
  // End -->
  </script>
</head>  
  
<body bgcolor="#000000" OnLoad="initMouseEvents()">
  <div id="sparks">
    <div id="sDiv0" style="position:absolute; visibility: hidden;">
      <font face="arial black" color="red">
        a
      </font>
    </div>
    <div id="sDiv1" style="position:absolute; visibility: hidden;">
      <font face="arial black" color="yellow">
        b
      </font>
    </div>
    <div id="sDiv2" style="position:absolute; visibility: hidden;">
      <font face="arial black" color="blue">
        c
      </font>
    </div>
    <div id="sDiv3" style="position:absolute; visibility: hidden;">
      <font face="arial black" color="red">
        d
      </font>
    </div>
    <div id="sDiv4" style="position:absolute; visibility: hidden;">
      <font face="arial black" color="orange">
        e
      </font>
    </div>
    <div id="sDiv5" style="position:absolute; visibility: hidden;">
      <font face="arial black" color="white">
        f
      </font>
    </div>
    <div id="sDiv6" style="position:absolute; visibility: hidden;">
      <font face="arial black" color="green">
        g
      </font>
    </div>
    <div id="sDiv7" style="position:absolute; visibility: hidden;">
      <font face="arial black" color="skyblue">
        h
      </font>
    </div>
    <div id="sDiv8" style="position:absolute; visibility: hidden;">
      <font face="arial black" color="yellow">
        i
      </font>
    </div>
    <div id="sDiv9" style="position:absolute; visibility: hidden;">
      <font face="arial black" color="white">
        j
      </font>
    </div>
  </div>
</body>
</html>
 

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