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JS implementation can get different color values of color selector instances _javascript tips

Source: Internet
Author: User
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The example of this article tells the JS implementation can get different color values of color selector. Share to everyone for your reference. The implementation methods are as follows:

Copy Code code as follows:
<title>js Color selector to get different color values </title>
<body>
<input ID=KKK1 style=position:absolute;left:0;top:0>
<input ID=KKK2 style=position:absolute;left:200;top:0>
<input ID=KKK3 style=position:absolute;left:400;top:0>
<input Id=kkk4 style=position:absolute;left:600;top:0>
<div id=rainbowdiv style= ' position:absolute;left:200;top:30; ' ></div>
<script>
var IW = ' 70 '///There are 6 colors, the width of each color is IW. Iw*6 is the width of the ribbon.
var IH = ' n ';//ih is the height of the ribbon.
Computes the HSV color code.
function HSV () {
Kkk1.value = ' X: ' +event.offsetx+ ' Y: ' +event.offsety;
var h,s,v;
var PY = event.offsety;
if (PY = = 0) {H = S = 0; V = 100;}
else{
if (PY = = iH-1) H = S = V = 0;
else{
H = Math.floor (360*event.offsetx/(iw*6));
S = Math.Round (50* (ih-py)/(IH/2));
V = Math.Round (100-50*PY/IH);
}
}
Kkk2.value= ' HSV (' +h+ ', ' +s+ '%, ' +v+ '%) ';
Hsvtorgb (h,s/100,v/100);
}

Calculates the RGB color code.
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))
}

Computes the HTML color code.
function rgbtohtml (r,g,b) {
R= (r>=16) r.tostring:(' 0 ' +r.tostring (16))
G= (g>=16) g.tostring:(' 0 ' +g.tostring (16))
b= (b>=16) b.tostring:(' 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>

More JS color operation can refer to the Site Color tool:

RGB Color Coding Generator

Online Web Color tool

RGB Color Query Matrix _ color code Table _ color of the English name Daquan

I hope this article will help you with your JavaScript programming.

This article is an English version of an article which is originally in the Chinese language on aliyun.com and is provided for information purposes only. This website makes no representation or warranty of any kind, either expressed or implied, as to the accuracy, completeness ownership or reliability of the article or any translations thereof. If you have any concerns or complaints relating to the article, please send an email, providing a detailed description of the concern or complaint, to info-contact@alibabacloud.com. A staff member will contact you within 5 working days. Once verified, infringing content will be removed immediately.

Related Keywords:
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