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  • JavaScript:雪景

    發表于:2007-06-21來源:作者:點擊數: 標簽:
    將下列代碼加入body區語種: SCRIPT LANGUAGE=" Java Script1.2" !-- Begin var no = 12; // number of hearts var speed = 10; // smaller number moves the hearts faster var heart = "../../image/xue.GIF"; var flag; var ns4up = (document.layers) ?

       

    將下列代碼加入<body>區語種:
    <SCRIPT LANGUAGE="JavaScript1.2">
    <!-- Begin
    var no = 12; // number of hearts
    var speed = 10; // smaller number moves the hearts faster
    var heart = "../../image/xue.GIF";
    var flag;

    var ns4up = (document.layers) ? 1 : 0;  // browser sniffer
    var ie4up = (document.all) ? 1 : 0;


    var dx, xp, yp;    // coordinate and position variables
    var am, stx, sty;  // amplitude and step variables
    var i, doc_width = 800, doc_height = 600;
    if (ns4up) {
    doc_width = self.innerWidth;
    doc_height = self.innerHeight;
    } else if (ie4up) {
    doc_width = document.body.clientWidth;
    doc_height = document.body.clientHeight;
    }
    dx = new Array();
    xp = new Array();
    yp = new Array();
    amx = new Array();
    amy = new Array();
    stx = new Array();
    sty = new Array();
    flag = new Array();
    for (i = 0; i < no; ++ i) {
    dx[i] = 0;                        // set coordinate variables
    xp[i] = Math.random()*(doc_width-30)+10;  // set position variables
    yp[i] = Math.random()*doc_height;
    amy[i] = 12+ Math.random()*20;         // set amplitude variables
    amx[i] = 10+ Math.random()*40;
    stx[i] = 0.02 + Math.random()/10; // set step variables
    sty[i] = 0.7 + Math.random();     // set step variables
    flag[i] = (Math.random()>0.5)?1:0;
    if (ns4up) {                      // set layers
    if (i == 0) {
    document.write("<layer name=\"dot"+ i +"\" left=\"15\" ");
    document.write("top=\"15\" visibility=\"show\"><img src=\"");
    document.write(heart+ "\" border=\"0\"></layer>");
    } else {
    document.write("<layer name=\"dot"+ i +"\" left=\"15\" ");
    document.write("top=\"15\" visibility=\"show\"><img src=\"");
    document.write(heart+ "\" border=\"0\"></layer>");
    }
    } else
    if (ie4up) {
    if (i == 0) {
    document.write("<div id=\"dot"+ i +"\" style=\"POSITION: ");
    document.write("absolute; Z-INDEX: "+ i +"; VISIBILITY: ");
    document.write("visible; TOP: 15px; LEFT: 15px;\"><img src=\"");
    document.write(heart+ "\" border=\"0\"></div>");
    } else {
    document.write("<div id=\"dot"+ i +"\" style=\"POSITION: ");
    document.write("absolute; Z-INDEX: "+ i +"; VISIBILITY: ");
    document.write("visible; TOP: 15px; LEFT: 15px;\"><img src=\"");
    document.write(heart+ "\" border=\"0\"></div>");
    }
    }
    }


    function snowNS() {  // Netscape main animation function
    for (i = 0; i < no; ++ i) {  // iterate for every dot
    if (yp[i] > doc_height-50) {
    xp[i] = 10+ Math.random()*(doc_width-amx[i]-30);
    yp[i] = 0;
    flag[i]=(Math.random()<0.5)?1:0;
    stx[i] = 0.02 + Math.random()/10;
    sty[i] = 0.7 + Math.random();
    doc_width = self.innerWidth;
    doc_height = self.innerHeight;
    }
    if (flag[i])
    dx[i] += stx[i];
    else
    dx[i] -= stx[i];
    if (Math.abs(dx[i]) > Math.PI) {
    yp[i]+=Math.abs(amy[i]*dx[i]);
    xp[i]+=amx[i]*dx[i];
    dx[i]=0;
    flag[i]=!flag[i];
    }
    document.layers["dot"+i].top = yp[i] + amy[i]*(Math.abs(Math.sin(dx[i])+dx[i]));
    document.layers["dot"+i].left = xp[i] + amx[i]*dx[i];


    }
    setTimeout("snowNS()", speed);
    }


    function snowIE() {  // IE main animation function
    for (i = 0; i < no; ++ i) {  // iterate for every dot
    if (yp[i] > doc_height-50) {
    xp[i] = 10+ Math.random()*(doc_width-amx[i]-30);
    yp[i] = 0;
    stx[i] = 0.02 + Math.random()/10;
    sty[i] = 0.7 + Math.random();
    flag[i]=(Math.random()<0.5)?1:0;
    doc_width = document.body.clientWidth;
    doc_height = document.body.clientHeight;
    }
    if (flag[i])
    dx[i] += stx[i];
    else
    dx[i] -= stx[i];
    if (Math.abs(dx[i]) > Math.PI) {
    yp[i]+=Math.abs(amy[i]*dx[i]);
    xp[i]+=amx[i]*dx[i];
    dx[i]=0;
    flag[i]=!flag[i];
    }


    document.all["dot"+i].style.pixelTop = yp[i] + amy[i]*(Math.abs(Math.sin(dx[i])+dx[i]));
    document.all["dot"+i].style.pixelLeft = xp[i] + amx[i]*dx[i];
    }
    setTimeout("snowIE()", speed);
    }


    if (ns4up) {
    snowNS();
    } else if (ie4up) {
    snowIE();
    }
    // End -->
    </script>
      
      

    原文轉自:http://www.kjueaiud.com

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