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js获取当前对象的颜色判断改变颜色

function toHex(N) {
  if (N==null) return "00";
  N=parseInt(N); if (N==0 || isNaN(N)) return "00";
  N=Math.max(0,N); N=Math.min(N,255); N=Math.round(N);
  return "0123456789abcdef".charAt((N-N%16)/16) + "0123456789abcdef".charAt(N%16);  //小写

 // return "0123456789ABCDEF".charAt((N-N%16)/16) + "0123456789ABCDEF".charAt(N%16);  //大写
}

function RGBtoHEX(str){
  if (str.substring(0, 3) == 'rgb') {
    var arr = str.split(",");
    var r = arr[0].replace('rgb(','').trim(), g = arr[1].trim(), b = arr[2].replace(')','').trim();
    var hex = [
      toHex(r),
      toHex(g),
      toHex(b)
    ];
    return "#" + hex.join(''); 
  }else{
    return str;
  }
}

  

使用时:

var color = RGBtoHEX($('.whitelists_no').css("backgroundColor"));
if(color == "#cccccc"){
  alert(123);
  return false;
} else {
  alert(456);
  return false;
}

posted @ 2016-04-13 11:16  Champion-水龙果  阅读(2902)  评论(0编辑  收藏  举报
Champion-水龙果