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JS实现网页上的颜色拾色器

时间：2014-06-17 08:35 来源：互联网作者：源码搜藏收藏推荐

<html>
<head>
<title>颜色拾色器</title>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312">
<style type="text/css">

</style>
</head>
<body style="font:menu">
<span class="style1"></span>
<table border="0" cellspacing="1" cellpadding="3" width="350" align="center" bgcolor="#dddddd">
<tr bgcolor="#FFFFFF"> 
<td width="10%" align="center"> 
<select name="select1" onchange="selectmenu(this.value)">
<option value="1" selected>红</option>
<option value="2">绿</option>
<option value="3">蓝</option>
<option value="4">灰</option>
</select>
</td>
<td width="90%" align="center"> 
<table width="100%" border="0" cellspacing="0" cellpadding="0">
<tr> 
<td align="center" style="font-size:12px">用鼠标单击下面的颜色块,将弹出颜色值</td>
</tr>
</table>
</td>
</tr>
<tr bgcolor="#FFFFFF"> 
<td width="10%" align="center"> 
  <table id="table1" border="0" cellspacing="1" cellpadding="0">
<script language="JavaScript">
for(i=0;i<=15;++i){
	document.write('<tr><td align="center" style="font:menu">'+ishex(i*17) +'</td><td id="Ltd' + i +'" bgcolor="rgb('+ (i*17) + ',0,0)" width="15" height="15" onclick="changeright(this.num)"></td></tr>')
	document.all['Ltd' + i].num=i
}
function ishex(which){
    return which.toString(16);
}
</script>
</table></td>
<td width="90%" align="center"> 
<table id="table2" border="0" cellspacing="1" cellpadding="0">
<script language="JavaScript">
document.write('<tr><td></td>')
for(i=0;i<=15;++i){
	document.write('<td align="center" style="font:menu; ">'+ishex(i*17)+'</td>');
}
document.write('</tr>')
for(i=0;i<=15;++i){
	document.write('<tr>')
	document.write('<td align="center" style="font:menu;">'+ishex(i*17)+'</td>')
 	for(j=0;j<=15;++j){
  		document.write('<td id="Rtd'+i+'and'+j+'" style="font:menu;" bgcolor="rgb(0,'+(i*17)+','+(j*17)+')" width="15" height="15" onclick="clickright(this)"></td>');
	}
 	document.write('</tr>')
}
</script>
</table>
</td>
</tr>
</table>
<script language="JavaScript">
function selectmenu(which){
	switch(which){
		case '1' :leftR();break;
   		case '2' :leftG();break;
   		case '3' :leftB();break;
   		case '4' :leftA();break;
  	}
}
function leftR(){
	for(i=0;i<=15;++i){
   		document.all['Ltd'+i].bgColor='rgb('+(i*17)+',0,0)';
   	}
 	rightR(0)
}
function leftG(){
	for(i=0;i<=15;++i){
   		document.all['Ltd'+i].bgColor='rgb(0,'+ (i*17) + ',0)';
	}
 	rightG(0)
}
function leftB(){
	for(i=0;i<=15;++i){
   		document.all['Ltd'+i].bgColor='rgb(0,0,'+(i*17)+')';
	}
 	rightB(0)
}
function leftA(){
	for(i=0;i<=15;++i){
   		document.all['Ltd'+i].bgColor='rgb('+(i*17)+','+(i*17)+','+(i*17)+')';
	}
 	rightA()
}
function rightR(which){
	for(i=0;i<=15;++i){
   		for(j=0;j<=15;++j){
     		document.all['Rtd'+i+'and'+j].bgColor='rgb('+(which*17)+','+(i*17)+','+(j*17)+')';
		}
    }
}
function rightG(which){
	for(i=0;i<=15;++i){
		for(j=0;j<=15;++j){
			document.all['Rtd'+i+'and'+j].bgColor='rgb('+(i*17)+','+(which*17)+','+(j*17)+')';
		}
    }
}
function rightB(which){
	for(i=0;i<=15;++i){
		for(j=0;j<=15;++j){
			document.all['Rtd'+ i+'and'+j].bgColor='rgb('+(i*17)+','+(j*17)+','+(which*17)+')';
	 	}
    }
}
function rightA(){
	for(i=0;i<=15;++i){
		for(j=0;j<=15;++j){
			document.all['Rtd'+i+'and'+j].bgColor='rgb('+(i*16+j)+','+(i*16+j)+','+(i*16+j)+')';
		}
    }
}
function clickright(which){
	alert(which.bgColor)
}
function changeright(which){
	switch(select1.value){
		case '1' :rightR(which);break;
   		case '2' :rightG(which);break;
   		case '3' :rightB(which);break;
 	}
}
</script>
</body>
</html>

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