<script type="text/javascript"> /* // 作者 yanue // 參數(shù)： // startColor：開始顏色hex // endColor：結(jié)束顏色hex // step:幾個(gè)階級(jí)（幾步） */ function gradientColor(startColor,endColor,step){  startRGB = this.colorRgb(startColor);//轉(zhuǎn)換為rgb數(shù)組模式  startR = startRGB[0];  startG = startRGB[1];  startB = startRGB[2];  endRGB = this.colorRgb(endColor);  endR = endRGB[0];  endG = endRGB[1];  endB = endRGB[2];  sR = (endR-startR)/step;//總差值  sG = (endG-startG)/step;  sB = (endB-startB)/step;  var colorArr = [];  for(var i=0;i<step;i++){  //計(jì)算每一步的hex值    var hex = this.colorHex('rgb('+parseInt((sR*i+startR))+','+parseInt((sG*i+startG))+','+parseInt((sB*i+startB))+')');   colorArr.push(hex);  }  return colorArr; } // 將hex表示方式轉(zhuǎn)換為rgb表示方式(這里返回rgb數(shù)組模式) gradientColor.prototype.colorRgb = function(sColor){  var reg = /^#([0-9a-fA-f]{3}|[0-9a-fA-f]{6})$/;  var sColor = sColor.toLowerCase();  if(sColor && reg.test(sColor)){   if(sColor.length === 4){    var sColorNew = "#";    for(var i=1; i<4; i+=1){     sColorNew += sColor.slice(i,i+1).concat(sColor.slice(i,i+1));    }    sColor = sColorNew;   }   //處理六位的顏色值   var sColorChange = [];   for(var i=1; i<7; i+=2){    sColorChange.push(parseInt("0x"+sColor.slice(i,i+2)));   }   return sColorChange;  }else{   return sColor;  } }; // 將rgb表示方式轉(zhuǎn)換為hex表示方式 gradientColor.prototype.colorHex = function(rgb){  var _this = rgb;  var reg = /^#([0-9a-fA-f]{3}|[0-9a-fA-f]{6})$/;  if(/^(rgb|RGB)/.test(_this)){   var aColor = _this.replace(/(?:(|)|rgb|RGB)*/g,"").split(",");   var strHex = "#";   for(var i=0; i<aColor.length; i++){    var hex = Number(aColor[i]).toString(16);    hex = hex<10 ? 0+''+hex :hex;// 保證每個(gè)rgb的值為2位    if(hex === "0"){     hex += hex;    }    strHex += hex;   }   if(strHex.length !== 7){    strHex = _this;   }   return strHex;  }else if(reg.test(_this)){   var aNum = _this.replace(/#/,"").split("");   if(aNum.length === 6){    return _this;   }else if(aNum.length === 3){    var numHex = "#";    for(var i=0; i<aNum.length; i+=1){     numHex += (aNum[i]+aNum[i]);    }    return numHex;   }  }else{   return _this;  } } var gradient = new gradientColor('#013548','#554851',10); console.log(gradient);//控制臺(tái)輸出 alert(gradient);</script>