网页的淡入淡出

Tags: /计算机文档/网页制作/ Date Created:

function makearray(n) {

this.length = n;

for(var i = 1; i <= n; i++)

this[i] = 0;

return this;

}

hexa = new makearray(16);

for(var i = 0; i < 10; i++)

hexa[i] = i;

hexa[10]="a"; hexa[11]="b"; hexa[12]="c";

hexa[13]="d"; hexa[14]="e"; hexa[15]="f";

function hex(i) {

if (i < 0)

return "00";

else if (i > 255)

return "ff";

else

return "" + hexa[Math.floor(i/16)] + hexa[i%16];

}

function setbgColor(r, g, b) {

var hr = hex(r); var hg = hex(g); var hb = hex(b);

document.bgColor = "#"+hr+hg+hb;

}

function fade(sr, sg, sb, er, eg, eb, step) {

for(var i = 0; i <= step; i++) {

setbgColor(

Math.floor(sr * ((step-i)/step) + er * (i/step)),

Math.floor(sg * ((step-i)/step) + eg * (i/step)),

Math.floor(sb * ((step-i)/step) + eb * (i/step)));

}

function fadein() {

fade(0,0,0, 0,128,128, 128);

}

function fadeout() {

fade(255,255,255, 0,128,128, 128);

}

</SCRIPT>

</head>