JavaScript 实现仿 Photoshop 调色板效果实例

<html>
<head>
<style>
#colorpad table{
  border-collapse:collapse;
  cellpadding:0;
  cellspacing:0;
  width:255px;
  height:255px;
  border:0;
}
#colorpadright table{
  border-collapse:collapse;
  cellpadding:0;
  cellspacing:0;
  width:255px;
  height:20px;
  border:0;
}
#colorpad{
  width:255px;
  height:255px;
}
#colorpadsample{
  width:100px;
  height:100px;
}
#colorpadright{
  height:20px;
  width:255px;
}
td{
  border:0;
  width:1px;
  height:1px;
  margin:0;padding:0
}
</style>
</head>
<div id="colorpad"></div>
<div id="colorpadright"></div>
<div id="colorpadsample"></div>
</html>
<script>
function setColor(style){
  document.getElementById('colorpadsample').style.background=style;
  var stylestylepiect1=style.split(',')[0];
  var stylestylepiect2=style.split(',')[2];
  var html='';var style='';
  html+='<table cellpadding=0 cellspace=0>';
  html+='<tr>';
  for(var i=0;i<256;i++){
    style= stylepiect1+','+i+','+stylepiect2;
    html+='<td style="background:'+style+'">';
    html+='</td>';
  }
  html+='</tr>';
   html+='</table>';
   document.getElementById('colorpadright').innerHTML=html;
}
var html='';
html+='<table cellpadding=0 cellspace=0>';
for(var i=0;i<256;i++){
html+='<tr>';
  for(var j=0;j<256;j++){
    html+='<td onclick="setColor(this.style.background)" style="background:rgb('+i+',0,'+j+');">';
    html+='</td>';
  }
   html+='</tr>';
}
html+='</table>';
document.getElementById('colorpad').innerHTML=html;
</script>