Js生成颜色代码设置起始色结束色和红绿蓝

TAG：取色器颜色代码　时间：2020-06-16　浏览：
Js生成彩色变化生成代码，就像是一个取色器那样，可以设置背景色、起始色、结束色，以及三基色红、绿、蓝，用户也可选择预设的几种颜色，然后点击生成代码，即可生成各个对应色的二进制颜色代码，对于网页取色十分方便。

<html>
<head><TITLE>彩色变化生成代码</TITLE>
<script language=JavaScript1.2>
var bName=navigator.appName;
var bVer=parseInt(navigator.appVersion);
var NS4=(bName=="Netscape" && bVer >= 4);
var IE4=(bName=="Microsoft Internet Explorer" && bVer >= 4);
var fstr_r;
var fstr_g;
var fstr_b;
var sItem="S";
function display(id, str){
  if(NS4 || IE4){
    if(NS4){
      with (document[id].document){
        open(); write(str); close();
      }
    }else document.all[id].innerHTML=str;
  }else{
    document.fsample2.startcolor.value=document.GradForm.start.value;
    document.fsample2.endcolor.value=document.GradForm.end.value;
  }
}
function makeArray(){
  for(i = 0; i<makeArray.arguments.length; i++)
    this[i] = makeArray.arguments[i];
}
var convert = new makeArray('0','1','2','3','4','5','6','7','8','9','A','B','C','D','E','F','G','H','I','J','K','L','M','N','O','P','Q','R','S','T','U','V','W','X','Y','Z');
function returnBase(number,base) {
  eval("var output=parseInt(number)");
  if(isNum(number,base)){
    if(number < base) output = convert[output];
    else{
      var MSD = '' + Math.floor(number / base);
      var LSD = number - MSD*base;
      if(MSD > base) output = returnBase(MSD,base) + convert[LSD];
      else output = convert[MSD] + convert[LSD];
    }
  }else{
    output=0;
  }
  return output;
}
function isNum(no, base){
  var cmp="0123456789";
  var chkStr=no;
  var chkChar;
  var rc=true;
  var nLen;
  if(base == 16){
    cmp+="ABCDEFabcdef";
  }else if(base == 10){
    eval("chkStr=''+parseInt(chkStr)");
  }
  nLen=chkStr.length;
  for(var i=0; i<nLen; i++){
     chkChar=chkStr.substring(i,i+1)
     if(i==0 && chkChar == "#" && base == 16){
     }else if(cmp.indexOf(chkChar)<0){
       rc=false;
     }
     if(rc == false) i=nLen;
  }
  return rc;
}
function chkNum(obj,base){
  var form=document.GradForm;
  var rc=true;
  if(base==10){
    eval("rc=form."+obj+".value <= 255");
  }
  if(rc){
    eval("rc=isNum(form."+obj+".value,"+base+")");
    if(!rc){
      alert("输入的数值不正确！");
      eval("form."+obj+".focus()");
    }
  }else{
    alert("输入的数值大于255！");
    eval("form."+obj+".focus()");
  }
  return rc;
}
function twobyte(no){
  var str=no;
  if(isNum(no,16)){
    str="0"+str;
    str=str.substring((str.length-3)+1);
  }else{
    str="00";
  }
  return str;
}
function CstrLen(cStr){
  var sLen=cStr.length;
  var j=0;
  for(var i=0;i<sLen;i++){
     str=cStr.charAt(i);
     if(NS4 && str.charCodeAt(0)<1){
       i++;
     }
     j++;
  }
  return j;
}
function GradientText(form, color1, color2, color3, gStr, gType){
  var redStep, greenStep, BlueStep;
  var str_r, str_g, str_b, str;
  var gStep=CstrLen(gStr);
  var b1 = color1 % 0x100; if(isNaN(b1)) b1=0;
  var g1 = parseInt(color1 / 0x100) % 0x100; if(isNaN(g1)) g1=0;
  var r1 = parseInt(color1 / 0x10000) % 0x100; if(isNaN(r1)) r1=0;
  var b2 = color2 % 0x100; if(isNaN(b2)) b2=0;
  var g2 = parseInt(color2 / 0x100) % 0x100; if(isNaN(g2)) g2=0;
  var r2 = parseInt(color2 / 0x10000) % 0x100; if(isNaN(r2)) r2=0;
  var cStepAdd = parseInt(256 / gStep);
  if(g1 > g2){
    greenStep = 0;
  }else if(g2 > g1){
    greenStep = 1;
  }else{
    greenStep = 2;
  }
  if(r1 > r2){
    redStep = 0;
  }else if(r2 > r1){
    redStep = 1;
  }else{
    redStep = 2;
  }
  if(b1 > b2){
    BlueStep = 0;
  }else if(b2 > b1){
    BlueStep = 1;
  }else{
    BlueStep = 2;
  }
  var GradStr="";
  if(gType == 'S'){
    GradStr+='<TABLE WIDTH="100%" BORDER=0 CELLSPACING=0 CELLPADDING=0><TR><TD ALIGN=CENTER BGCOLOR="'+color3+'"><br>';
  }
  for(var i=0; i<gStr.length; i++){
     str_r=twobyte(returnBase(r1,16));
     str_g=twobyte(returnBase(g1,16));
     str_b=twobyte(returnBase(b1,16));
     str=gStr.charAt(i);
     if(NS4 && str.charCodeAt(0)<1){
       str=str+gStr.charAt(i+1);
       i++;
     }
     GradStr+='<font color="#'+str_r+str_g+str_b+'">'+str+'</font>';
     if(redStep==1){
       r1 = r1 + cStepAdd;
       if(r1 > r2) r1 = r2;
     }else if(redStep==0){
       r1 = r1 - cStepAdd;
       if(r1 < r2) r1 = r2;
     }
     if(greenStep==1){
       g1 = g1 + cStepAdd;
       if(g1 > g2) g1 = g2;
     }else if(greenStep==0){
       g1 = g1 - cStepAdd;
       if(g1 < g2) g1 = g2;
     }
     if(BlueStep==1){
       b1 = b1 + cStepAdd;
       if(b1 > b2) b1 = b2;
     }else if(BlueStep==0){
       b1 = b1 - cStepAdd;
       if(b1 < b2) b1 = b2;
     }
  }
  if(gType == 'S'){
    GradStr+='<br>&nbsp;</TD></TR></TABLE>';
  }
  return GradStr;
}
function GenTag(form){
  var ss,ee,bb;
  if(!isNum(form.start.value,16)){
    alert("请检查起始颜色数值");
  }else if(!isNum(form.end.value,16)){
    alert("请检查结束颜色数值");
  }else if(!isNum(form.bg.value,16)){
    alert("请检查背景颜色数值");
  }else{
    eval("ss=0x"+form.start.value.substring(1)+";");
    eval("ee=0x"+form.end.value.substring(1)+";");
    eval("bb=form.bg.value");
    form.code.value=GradientText(form,ss,ee,bb,form.showstr.value,"C");
  }
}
function newRGB(type, field2){
  var form=document.GradForm;
  var chkOK=true;
  var vNo;
  if(field2==""){
    if(sItem=="S"){
      chkOK=chkNum('start',16);
    }else if(sItem=="E"){
      chkOK=chkNum('end',16);
    }else if(sItem=="B"){
      chkOK=chkNum('bg',16);
    }
  }
  if(chkOK){
    if(type==0){
      if(field2 != "") eval("chkOK=isNum(form.rgb_"+field2+".value,10)");
      if(chkOK){
        if(field2 != "") eval("chkOK=chkNum('rgb_"+field2+"',10)");
        if(chkOK){
          fstr_r=twobyte(returnBase(form.rgb_r.value,16));
          fstr_g=twobyte(returnBase(form.rgb_g.value,16));
          fstr_b=twobyte(returnBase(form.rgb_b.value,16));
          if(sItem=="S"){
            form.start.value="#"+fstr_r+fstr_g+fstr_b;
          }else if(sItem=="E"){
            form.end.value="#"+fstr_r+fstr_g+fstr_b;
          }else if(sItem=="B"){
            form.bg.value="#"+fstr_r+fstr_g+fstr_b;
          }
        }
      }else{
        alert("输入的颜色数值不正确。");
        eval("form.rgb_"+field2+"s.focus()");
      }
    }else{
      if(sItem=="S"){
        fstr_r=form.start.value.substring(1,3);
        fstr_g=form.start.value.substring(3,5);
        fstr_b=form.start.value.substring(5,7);
      }else if(sItem=="E"){
        fstr_r=form.end.value.substring(1,3);
        fstr_g=form.end.value.substring(3,5);
        fstr_b=form.end.value.substring(5,7);
      }else if(sItem=="B"){
        fstr_r=form.bg.value.substring(1,3);
        fstr_g=form.bg.value.substring(3,5);
        fstr_b=form.bg.value.substring(5,7);
      }
      form.rgb_r.value=parseInt(fstr_r,16);
      form.rgb_g.value=parseInt(fstr_g,16);
      form.rgb_b.value=parseInt(fstr_b,16);
    }
    if(chkOK) AddText();
  }
}
function AddText(){
  var form=document.GradForm;
  var ss,ee,bb;
  eval("ss=0x"+form.start.value.substring(1)+";");
  eval("ee=0x"+form.end.value.substring(1)+";");
  eval("bb=form.bg.value");
  str=GradientText(form,ss,ee,bb,form.showstr.value,"S");
  display("fsample", str);
}
function setRGB(id,no){
  var form=document.GradForm;
  var nid="rgb_"+id;
  if(id){
    var tmp=eval("parseInt(form."+nid+".value)+parseInt("+no+")");
    if(tmp<0) tmp=255;
    else if(tmp>255) tmp=0;
    eval("form."+nid+".value="+tmp);
  }
  fstr_r=twobyte(returnBase(form.rgb_r.value,16));
  fstr_g=twobyte(returnBase(form.rgb_g.value,16));
  fstr_b=twobyte(returnBase(form.rgb_b.value,16));
  if(sItem=="S"){
    form.start.value="#"+fstr_r+fstr_g+fstr_b;
  }else if(sItem=="E"){
    form.end.value="#"+fstr_r+fstr_g+fstr_b;
  }else if(sItem=="B"){
    form.bg.value="#"+fstr_r+fstr_g+fstr_b;
  }
  AddText();
}
function SetColor(clr){
  if(sItem=="S"){
    document.GradForm.start.value="#"+clr;
  }else if(sItem=="E"){
    document.GradForm.end.value="#"+clr;
  }else if(sItem=="B"){
    document.GradForm.bg.value="#"+clr;
  }
  ResetValue();
  AddText();
}
function set(swtch){
  if(swtch == 1) sItem="S";
  else if (swtch == 2) sItem="E";
  else if (swtch == 0) sItem="B";
  ResetValue();
}
function ResetValue(){
  var form=document.GradForm;
  var str_r, str_g, str_b;
  if(sItem=="S"){
    str_r=form.start.value.substring(1,3);
    str_g=form.start.value.substring(3,5);
    str_b=form.start.value.substring(5,7);
  }else if(sItem=="E"){
    str_r=form.end.value.substring(1,3);
    str_g=form.end.value.substring(3,5);
    str_b=form.end.value.substring(5,7);
  }else if(sItem=="B"){
    str_r=form.bg.value.substring(1,3);
    str_g=form.bg.value.substring(3,5);
    str_b=form.bg.value.substring(5,7);
  }
  form.rgb_r.value=parseInt(str_r,16);
  form.rgb_g.value=parseInt(str_g,16);
  form.rgb_b.value=parseInt(str_b,16);
}
function nomsg(){
  self.status="";
}
function myReset(){
  AddText();
}
</script>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312" />
<title>无标题文档</title>
</head>
<body>
<tr><td align=center width=450 height=400> <form name=GradForm>
      <table border=1 align="left">
        <tr><td>&nbsp;<INPUT type=radio name=setitem value="bg" onClick="set(0)">背景色<input type=text name="bg" size=6 value="#FFFFFF" onChange="newRGB(1,'')"><INPUT type=radio name=setitem value="start" onClick="set(1)" checked>起始色<input type=text name="start" size=6 value="#FF0000" onChange="newRGB(1,'')">&nbsp;<INPUT type=radio name=setitem value="end" onClick="set(2)">结束色<input type=text name="end" size=6 value="#0000FF" onChange="newRGB(1,'')"></td></tr><tr><td><font color="#FF0000">红</font> <input type="Button" value="+" onClick="setRGB('r',1)"><INPUT type=text name=rgb_r size=3 value=0 onChange="newRGB(0,'r')"><input type="Button" value="-" onClick="setRGB('r',-1)"><font color="#009900">绿</font> <input type="Button" value="+" onClick="setRGB('g',1)"><INPUT type=text name=rgb_g size=3 value=0 onChange="newRGB(0,'g')"><input type="Button" value="-" onClick="setRGB('g',-1)"><font color="#0000FF">蓝</font> <input type="Button" value="+" onClick="setRGB('b',1)"><INPUT type=text name=rgb_b size=3 value=255 onChange="newRGB(0,'b')"><input type="Button" value="-" onClick="setRGB('b',-1)"></td></tr><tr><td><TABLE BORDER=1 CELLSPACING=-1 CELLPADDING=1><TR><TD BGCOLOR="#FFFFFF"><a href="#" onClick="SetColor('FFFFFF');return false" onMouseOver="nomsg();return true">&nbsp;&nbsp;</a></TD><TD BGCOLOR="#FFFF00"><a href="#" onClick="SetColor('FFFF00');return false" onMouseOver="nomsg();return true">&nbsp;&nbsp;</a></TD><TD BGCOLOR="#FFE000"><a href="#" onClick="SetColor('FFE000');return false" onMouseOver="nomsg();return true">&nbsp;&nbsp;</a></TD><TD BGCOLOR="#FFC000"><a href="#" onClick="SetColor('FFC000');return false" onMouseOver="nomsg();return true">&nbsp;&nbsp;</a></TD><TD BGCOLOR="#FFA000"><a href="#" onClick="SetColor('FFA000');return false" onMouseOver="nomsg();return true">&nbsp;&nbsp;</a></TD><TD BGCOLOR="#FF8000"><a href="#" onClick="SetColor('FF8000');return false" onMouseOver="nomsg();return true">&nbsp;&nbsp;</a></TD><TD BGCOLOR="#FF6000"><a href="#" onClick="SetColor('FF6000');return false" onMouseOver="nomsg();return true">&nbsp;&nbsp;</a></TD><TD BGCOLOR="#FF4000"><a href="#" onClick="SetColor('FF4000');return false" onMouseOver="nomsg();return true">&nbsp;&nbsp;</a></TD><TD BGCOLOR="#FF0000"><a href="#" onClick="SetColor('FF0000');return false" onMouseOver="nomsg();return true">&nbsp;&nbsp;</a></TD><TD BGCOLOR="#E00000"><a href="#" onClick="SetColor('E00000');return false" onMouseOver="nomsg();return true">&nbsp;&nbsp;</a></TD><TD BGCOLOR="#C00000"><a href="#" onClick="SetColor('C00000');return false" onMouseOver="nomsg();return true">&nbsp;&nbsp;</a></TD><TD BGCOLOR="#FFC0FF"><a href="#" onClick="SetColor('FFC0FF');return false" onMouseOver="nomsg();return true">&nbsp;&nbsp;</a></TD><TD BGCOLOR="#FFA0FF"><a href="#" onClick="SetColor('FFA0FF');return false" onMouseOver="nomsg();return true">&nbsp;&nbsp;</a></TD><TD BGCOLOR="#FF80FF"><a href="#" onClick="SetColor('FF80FF');return false" onMouseOver="nomsg();return true">&nbsp;&nbsp;</a></TD><TD BGCOLOR="#FF60FF"><a href="#" onClick="SetColor('FF60FF');return false" onMouseOver="nomsg();return true">&nbsp;&nbsp;</a></TD><TD BGCOLOR="#FF00FF"><a href="#" onClick="SetColor('FF00FF');return false" onMouseOver="nomsg();return true">&nbsp;&nbsp;</a></TD><TD BGCOLOR="#E000FF"><a href="#" onClick="SetColor('E000FF');return false" onMouseOver="nomsg();return true">&nbsp;&nbsp;</a></TD><TD BGCOLOR="#C000FF"><a href="#" onClick="SetColor('C000FF');return false" onMouseOver="nomsg();return true">&nbsp;&nbsp;</a></TD><TD BGCOLOR="#A000FF"><a href="#" onClick="SetColor('A000FF');return false" onMouseOver="nomsg();return true">&nbsp;&nbsp;</a></TD><TD BGCOLOR="#8000FF"><a href="#" onClick="SetColor('8000FF');return false" onMouseOver="nomsg();return true">&nbsp;&nbsp;</a></TD><TD BGCOLOR="#00FFFF"><a href="#" onClick="SetColor('00FFFF');return false" onMouseOver="nomsg();return true">&nbsp;&nbsp;</a></TD><TD BGCOLOR="#00E0FF"><a href="#" onClick="SetColor('00E0FF');return false" onMouseOver="nomsg();return true">&nbsp;&nbsp;</a></TD></tr><tr><TD BGCOLOR="#00C0FF"><a href="#" onClick="SetColor('00C0FF');return false" onMouseOver="nomsg();return true">&nbsp;&nbsp;</a></TD><TD BGCOLOR="#00A0FF"><a href="#" onClick="SetColor('00A0FF');return false" onMouseOver="nomsg();return true">&nbsp;&nbsp;</a></TD><TD BGCOLOR="#0080FF"><a href="#" onClick="SetColor('0080FF');return false" onMouseOver="nomsg();return true">&nbsp;&nbsp;</a></TD><TD BGCOLOR="#0060FF"><a href="#" onClick="SetColor('0060FF');return false" onMouseOver="nomsg();return true">&nbsp;&nbsp;</a></TD><TD BGCOLOR="#0000FF"><a href="#" onClick="SetColor('0000FF');return false" onMouseOver="nomsg();return true">&nbsp;&nbsp;</a></TD><TD BGCOLOR="#0000E0"><a href="#" onClick="SetColor('0000E0');return false" onMouseOver="nomsg();return true">&nbsp;&nbsp;</a></TD><TD BGCOLOR="#0000C0"><a href="#" onClick="SetColor('0000C0');return false" onMouseOver="nomsg();return true">&nbsp;&nbsp;</a></TD><TD BGCOLOR="#D0FF00"><a href="#" onClick="SetColor('D0FF00');return false" onMouseOver="nomsg();return true">&nbsp;&nbsp;</a></TD><TD BGCOLOR="#A0FF00"><a href="#" onClick="SetColor('A0FF00');return false" onMouseOver="nomsg();return true">&nbsp;&nbsp;</a></TD><TD BGCOLOR="#80FF00"><a href="#" onClick="SetColor('80FF00');return false" onMouseOver="nomsg();return true">&nbsp;&nbsp;</a></TD><TD BGCOLOR="#00FF00"><a href="#" onClick="SetColor('00FF00');return false" onMouseOver="nomsg();return true">&nbsp;&nbsp;</a></TD><TD BGCOLOR="#00E000"><a href="#" onClick="SetColor('00E000');return false" onMouseOver="nomsg();return true">&nbsp;&nbsp;</a></TD><TD BGCOLOR="#00C000"><a href="#" onClick="SetColor('00C000');return false" onMouseOver="nomsg();return true">&nbsp;&nbsp;</a></TD><TD BGCOLOR="#00A000"><a href="#" onClick="SetColor('00A000');return false" onMouseOver="nomsg();return true">&nbsp;&nbsp;</a></TD><TD BGCOLOR="#008000"><a href="#" onClick="SetColor('008000');return false" onMouseOver="nomsg();return true">&nbsp;&nbsp;</a></TD><TD BGCOLOR="#00A0A0"><a href="#" onClick="SetColor('00A0A0');return false" onMouseOver="nomsg();return true">&nbsp;&nbsp;</a></TD><TD BGCOLOR="#A0A000"><a href="#" onClick="SetColor('A0A000');return false" onMouseOver="nomsg();return true">&nbsp;&nbsp;</a></TD><TD BGCOLOR="#A0A0A0"><a href="#" onClick="SetColor('A0A0A0');return false" onMouseOver="nomsg();return true">&nbsp;&nbsp;</a></TD><TD BGCOLOR="#A0A0E0"><a href="#" onClick="SetColor('A0A0E0');return false" onMouseOver="nomsg();return true">&nbsp;&nbsp;</a></TD><TD BGCOLOR="#E0A0A0"><a href="#" onClick="SetColor('E0A0A0');return false" onMouseOver="nomsg();return true">&nbsp;&nbsp;</a></TD><TD BGCOLOR="#A0E0A0"><a href="#" onClick="SetColor('A0E0A0');return false" onMouseOver="nomsg();return true">&nbsp;&nbsp;</a></TD><TD BGCOLOR="#000000"><a href="#" onClick="SetColor('000000');return false" onMouseOver="nomsg();return true">&nbsp;&nbsp;</a></TD></TR></TABLE></td></tr><tr><td>显示文字：
            <input type=text name="showstr" value="Shen  Long" onChange="AddText()">
          </td></tr><tr><td><input type=hidden name="tempVal" value="">代码如下：<br><TEXTAREA wrap=soft name=code COLS=62 ROWS=6"></TEXTAREA></td></tr><tr><td><INPUT TYPE="button" VALUE="生成代码" onClick='GenTag(this.form)'><INPUT TYPE="button" VALUE="预览效果" onClick='AddText()'><INPUT TYPE="reset" VALUE="全部清除"></td></tr></table></form>
    <SPAN ID="fsample" STYLE="position: absolute;left:53px;top:327px; color: black; font-weight: normal; font-size: 9pt; width: 311px; height: 41px">
    <form name="fsample2">起始颜色<input type=text name="startcolor" size=8 onFocus="this.blur()">结束颜色<input type=text name="endcolor" size=8 onFocus="this.blur()"></form></SPAN><SCRIPT LANGUAGE="JavaScript"></SCRIPT></td></tr><br><br><center><SCRIPT LANGUAGE="JavaScript"></SCRIPT>
</center>
</body>
</html>

Js生成颜色代码设置起始色结束色和红绿蓝

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Js生成颜色代码 设置起始色结束色和红绿蓝

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Js生成颜色代码设置起始色结束色和红绿蓝