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10.11 背景变换的飞舞文字.htm
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10.11 背景变换的飞舞文字.htm
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<html>
<head>
<title>10.11 背景变换的飞舞文字</title>
<meta http-equiv="content-Type" content="text/html;charset=gb2312">
</head>
<body>
<SCRIPT>
function morph(e,wait,steps,style,done){
if(e.morphing){
return;
}
e.morphing = true;
e.step = 0;
e.done = steps;
e.wait = wait;
e.morphDone = done;
var attribs = _eat_attrib(style);
if(attribs["top"] != null){
e.deltaTop = Math.round(Number((attribs["top"] - e.style.posTop) / steps));
e.finalTop = attribs["top"];
}else{
e.deltaTop = null;
e.finalTop = e.style.posTop;
}
if(attribs["left"] != null){
e.deltaLeft = Math.round(Number((attribs["left"] - e.style.posLeft) / steps));
e.finalLeft = attribs["left"];
}else{
e.deltaLeft = null;
e.finalLeft = e.style.posLeft;
}
if(attribs["height"] != null){
e.deltaHeight = Math.round(Number((attribs["height"] - e.style.posHeight) / steps));
e.finalHeight = attribs["height"];
}else{
e.deltaHeight = null;
e.finalHeight = e.style.posHeight;
}
if(attribs["width"] != null){
e.deltaWidth = Math.round(Number((attribs["width"] - e.style.posWidth) / steps));
e.finalWidth = attribs["width"];
}else{
e.deltaWidth = null;
e.finalWidth = e.style.posWidth;
}
e.colors = new Array();
for(attrib in attribs){
if(attrib == "background"){
e.colors[e.colors.length] = new Array();
e.colors[e.colors.length - 1].name = attrib;
e.colors[e.colors.length - 1].safename = attrib;
}
if(attrib == "color"){
e.colors[e.colors.length] = new Array();
e.colors[e.colors.length - 1].name = attrib;
e.colors[e.colors.length - 1].safename = attrib;
}
if(attrib == "border-color"){
e.colors[e.colors.length] = new Array();
e.colors[e.colors.length - 1].name = attrib;
e.colors[e.colors.length - 1].safename = "borderColor";
}
}
for(var i=0;i<e.colors.length;i++){
var rgb = _eat_rgb(attribs[e.colors[i].name]);
var prergb = _eat_rgb(e.style[e.colors[i].safename]);
e.colors[i].delta = _eat_rgb(attribs[e.colors[i].name]);
e.colors[i].finish = _eat_rgb(attribs[e.colors[i].name]);
e.colors[i].delta["red"] = Math.round(Number((rgb["red"] - prergb["red"]) / steps));
e.colors[i].delta["green"] = Math.round(Number((rgb["green"] - prergb["green"]) / steps));
e.colors[i].delta["blue"] = Math.round(Number((rgb["blue"] - prergb["blue"]) / steps));
}
setTimeout("_morphing(document.all." + e.id + ")", wait);
}
function _morphing(e){
e.step++;
if(e.deltaTop!=null){
e.style.posTop += e.deltaTop;
}
if(e.deltaLeft!=null){
e.style.posLeft += e.deltaLeft;
}
if(e.deltaHeight!=null){
e.style.posHeight += e.deltaHeight;
}
if(e.deltaWidth!=null){
e.style.posWidth += e.deltaWidth;
}
for(var i=0;i<e.colors.length;i++){
var rgb = _eat_rgb(e.style[e.colors[i].safename]);
e.style[e.colors[i].safename] = "rgb("
+ (e.colors[i].delta["red"] + rgb["red"])
+ ","
+ (e.colors[i].delta["green"] + rgb["green"])
+ ","
+ (e.colors[i].delta["blue"] + rgb["blue"])
+ ")";
}
if(e.step == e.done){
if(e.deltaTop != null)
e.style.posTop = e.finalTop;
if(e.deltaLeft != null)
e.style.posLeft = e.finalLeft;
if(e.deltaWidth != null)
e.style.posWidth = e.finalWidth;
if(e.deltaHeight != null)
e.style.posHeight = e.finalHeight;
for(var i=0;i<e.colors.length;i++){
e.style[e.colors[i].safename] = "rgb("
+ (e.colors[i].finish["red"] + rgb["red"])
+ ","
+ (e.colors[i].finish["green"] + rgb["green"])
+ ","
+ (e.colors[i].finish["blue"] + rgb["blue"])
+ ")";
}
e.morphing = false;
eval(e.morphDone);
}else{
setTimeout("_morphing(document.all." + e.id + ")", e.wait);
}
return;
}
function _eat_attrib(str){
var chunks = new Array();
var all = new Array();
chunks=str.split(";");
for(var i=0;i<chunks.length;i++){
var tmpA = new Array();
tmpA=chunks[i].split(":");
all[tmpA[0]]=tmpA[1];
}
return all;
}
function _eat_rgb(str){
var all = new Array();
var a = str.indexOf("(");
var b = str.indexOf(")");
str = str.substring(a + 1, b);
var tmpA = str.split(",");
all["red"]=Number(tmpA[0]);
all["green"]=Number(tmpA[1]);
all["blue"]=Number(tmpA[2]);
return all;
}
////////////////////
</SCRIPT>
<SPAN ID="test" STYLE="border:5px solid rgb(0,0,0);color:rgb(255,255,255);position:absolute;top:0;left:0;width:400;height:400;overflow:hidden;background:rgb(0,0,255)">
北京欢迎您的光临！
</SPAN>
<SCRIPT>
function rander(){
var top = Math.round(Math.random() * 400);
var left = Math.round(Math.random() * 600);
var width = Math.round(Math.random() * 200);
var height = Math.round(Math.random() * 200);
var r = Math.round(Math.random() * 255);
var g = Math.round(Math.random() * 255);
var b = Math.round(Math.random() * 255);
var background = "rgb(" + r + "," + g + "," + b + ")";
var r = Math.round(Math.random() * 255);
var g = Math.round(Math.random() * 255);
var b = Math.round(Math.random() * 255);
var borderColor = "rgb(" + r + "," + g + "," + b + ")";
var r = Math.round(Math.random() * 255);
var g = Math.round(Math.random() * 255);
var b = Math.round(Math.random() * 255);
var color = "rgb(" + r + "," + g + "," + b + ")";
morph(document.all.test,30,20,"top:" + top + ";left:" + left + ";width:" + width + ";height:" + height + ";background:" + background + ";border-color:" + borderColor + ";color:" + color + ";","rander();");
}
rander();
</SCRIPT>
</body>
</html>