本文實例講述了js實現可得到不同顏色值的顏色選擇器。分享給大家供大家參考。具體實現方法如下：
//計算RGB顏色代碼。
function HSVtoRGB(h,s,v){
var i, f ,p1 ,p2 ,p3;
var r = g = b = 0;
if(s < 0) s=0;
if(s > 1) s=1;
if(v < 0) v=0;
if(v > 1) v=1;
h %= 360;
if(h < 0) h+=360;
h /= 60;
i = Math.floor(h);
f = h-i;
p1 = v*(1-s);
p2 = v*(1-s*f);
p3 = v*(1-s*(1-f));
if(i == 0){r=v; g=p3; b=p1;}
else if(i == 1){r=p2; g=v; b=p1;}
else if(i == 2){r=p1; g=v; b=p3;}
else if(i == 3){r=p1; g=p2; b=v;}
else if(i == 4){r=p3; g=p1; b=v;}
else if(i == 5){r=v; g=p1; b=p2;}
kkk3.value='RGB('+Math.round(r*255)+','+Math.round(g*255)+','+Math.round(b*255)+')';
RGBtoHTML(Math.round(r*255),Math.round(g*255),Math.round(b*255))
}
//計算HTML顏色代碼。
function RGBtoHTML(r,g,b){
r=(r>=16)?r.toString(16):('0'+r.toString(16))
g=(g>=16)?g.toString(16):('0'+g.toString(16))
b=(b>=16)?b.toString(16):('0'+b.toString(16))
kkk4.value='HTML #'+r+g+b;
}
function window.onload(){
var RainBow = new Array(255,0,0, 255,255,0, 0,255,0, 0,255,255, 0,0,255, 255,0,255, 255,0,0);
for(var i=0;i<6;i++){
var R1 = RainBow[i*3];
var G1 = RainBow[i*3+1];
var B1 = RainBow[i*3+2];
var R2 = RainBow[(i+1)*3];
var G2 = RainBow[(i+1)*3+1];
var B2 = RainBow[(i+1)*3+2];
RainBowDiv.innerHTML += "<div style='position:absolute;left:"+i*iW+";top:0;width:"+iW+";height:"+iH+";background:rgb("+R1+","+G1+","+B1+");'></div><div style='position:absolute;left:"+i*iW+";top:0;width:"+iW+";height:"+iH+";background:rgb("+R2+","+G2+","+B2+");filter:alpha(opacity=0,finishopacity=100,Style=1);'></div>"
}
RainBowDiv.innerHTML += "<div style=position:absolute;left:0;top:0;width:"+6*iW+";height:"+iH+";background:rgb(128,128,128);filter:alpha(opacity=0,finishOpacity=100,style=1,starty=0,finishy=100,startx=0,finishx=0)></div><div style='position:absolute;left:0;top:0;width:"+(6*iW+1)+";height:"+iH+";' onmousemove=HSV()></div>"
}
</script>
</body>
</html>
更多js顏色操作可參考本站顏色工具：
希望本文所述對大家的javascript程序設計有所幫助。
新聞熱點
疑難解答
