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首页 / 脚本样式 / JavaScript / javascript实现根据3原色制作颜色选择器的方法

本文实例讲述了javascript实现根据3原色制作颜色选择器的方法。分享给大家供大家参考。具体如下:
document.write("<div id="msecolor"><div class="aa"><div class="ab"><div class="ab1"><select onchange="T.f(this.value)"><option value="1">红</option><option value="3">绿</option><option value="5">蓝</option><option value="7">灰</option></select></div><div id="msecolor_ab2"><input type="text" maxlength="7"><span></span></div></div><div class="ac"><div id="msecolor_ac1"></div><div id="msecolor_ac2"></div></div></div></div>");T={s:true};T.a=A.$("msecolor_ab2").children[0];T.b=A.$("msecolor_ab2").children[1];T.c=A.$("msecolor_ac1");T.d=A.$("msecolor_ac2");T.ini=function(id,fun){ this.fun=fun; if(typeof(id)!="object") id=A.$(id); this.obj=id; var w=A.wz(id); var ph=document.documentElement.clientHeight,pw=document.documentElement.clientWidth; var sh=document.documentElement.scrollTop,sw=document.documentElement.scrollLeft; if(w.x-sw+322 > pw){var l=w.x+id.offsetWidth - 322; }else{var l=w.x; } if(w.y-sh+329+id.offsetHeight > ph){var t=w.y - 329; }else{var t=w.y+id.offsetHeight; } with(A.$("msecolor").style){display="block";top=t+"px";left=l+"px"; }}T.hide=function(){A.$("msecolor").style.display="none";}T.e=["0","1","2","3","4","5","6","7","8","9","A","B","C","D","E","F"];T.f=function(a){ T.h=a; T.c.innerHTML=""; if(a==7){for(var i=0;i<16;i++){var s=A.$$("span");s.title=s.style.backgroundColor="#"+T.e[i]+T.e[i]+T.e[i]+T.e[i]+T.e[i]+T.e[i];T.c.appendChild(s);}T.g(a,0); }else{ for(var i=0;i<16;i++){ var s=A.$$("span"); s.title=s.style.backgroundColor=T.z(a,T.e[i]); T.c.appendChild(s); s.onclick=function(){var s=this.title.substr(1,1);if(s=="0")s=this.title.substr(3,1);if(s=="0")s=this.title.substr(5,1);T.g(T.h,s);} } T.g(a,0); }}T.g=function(a,b){ T.d.innerHTML=""; switch(parseInt(a)){case 1:var c=3,e=5,g="T.z(a,b,c,T.e[parseInt(i/16)],e,T.e[i%16])";break;case 3:var c=1,e=5,g="T.z(c,T.e[parseInt(i/16)],a,b,e,T.e[i%16])";break;case 5:var c=1,e=3,g="T.z(c,T.e[parseInt(i/16)],e,T.e[i%16],a,b)";break;case 7:for(var i=0;i<256;i++){ var s=document.createElement("span"); s.title=s.style.backgroundColor="#"+T.e[parseInt(i/16)]+T.e[i%16]+T.e[parseInt(i/16)]+T.e[i%16]+T.e[parseInt(i/16)]+T.e[i%16]; s.onmouseover=function(){T.a.value=this.title;T.b.style.backgroundColor=this.style.backgroundColor;T.b.title=this.title; } s.onclick=function(){T.hide();T.fun(this.title,T.obj); } T.d.appendChild(s);}return false;break; } for(var i=0;i<256;i++){ var s=document.createElement("span"); s.title=s.style.backgroundColor=eval(g); s.onmouseover=function(){T.b.style.backgroundColor=this.style.backgroundColor;T.a.value=this.title;T.b.title=this.title; } s.onclick=function(){T.hide();T.fun(this.title,T.obj); } T.d.appendChild(s); }}T.b.onclick=function(){ T.hide(); T.fun(this.title,T.obj);}T.a.onkeyup=function(e){ var e=e || event; if(e.keyCode==13){T.b.style.backgroundColor=this.value;T.b.title=this.value;T.hide();T.fun(this.value,T.obj); }}T.z=function(a,b,c,d,e,f){s="#";a=parseInt(a);c=parseInt(c);e=parseInt(e);for(var i=0;i<6;i++){if(i>=(a-1) && i<(a+1)){s+=b;}else if(i>=(c-1) && i<(c+1)){s+=d;}else if(i>=(e-1) && i<(e+1)){s+=f;}else{s+="0";}}return s;}T.f(1);
运行效果图如下:


希望本文所述对大家的javascript程序设计有所帮助。