js二进制转十进制的方法
js二进制转十进制的方法，javascript中怎么将2进制转为10进制教程如下：
输入一个二进制数字
实现结果：转换成十进制数字
js实现代码如下：
$(document).ready(function() {
$('[name="input_"]').click(function() {
$('#input_num').val($(this).val());
$('#input_value').val("");
$('#output_value').val("");
});
$('[name="output_"]').click(function() {
$('#output_num').val($(this).val());
px(1);
});
$("#input_num").change(function() {
$("#input_area input").removeAttr("checked");
var val = $(this).val();
$("#input_area input[value=" + val + "]").attr("checked", "checked");
$('#input_value').val("");
$('#output_value').val("");
});
$("#output_num").change(function() {
$("#output_area input").removeAttr("checked");
var val = $(this).val();
$("#output_area input[value=" + val + "]").attr("checked", "checked");
px(1);
});
});
function pxparseFloat(x, y) {
x = x.toString();
var num = x;
var data = num.split(".");
var you = data[1].split(""); //灏嗗彸杈硅浆鎹负鏁扮粍 寰楀埌绫讳技 [1,0,1]
var sum = 0; //灏忔暟閮ㄥ垎鐨勫拰
for (var i = 0; i < data[1].length; i++) {
sum += you[i] * Math.pow(y, -1 * (i + 1))
}
return parseInt(data[0], y) + sum;
}
function zhengze(x) {
var str;
x = parseInt(x);
if (x <= 10) {
str = new RegExp("^[+\\-]?[0-" + (x - 1) + "]*[.]?[0-" + (x - 1) + "]*$", "gi");
} else {
var letter = "";
switch (x) {
case 11:
letter = "a";
break;
case 12:
letter = "b";
break;
case 13:
letter = "c";
break;
case 14:
letter = "d";
break;
case 15:
letter = "e";
break;
case 16:
letter = "f";
break;
case 17:
letter = "g";
break;
case 18:
letter = "h";
break;
case 19:
letter = "i";
break;
case 20:
letter = "j";
break;
case 21:
letter = "k";
break;
case 22:
letter = "l";
break;
case 23:
letter = "m";
break;
case 24:
letter = "n";
break;
case 25:
letter = "o";
break;
case 26:
letter = "p";
break;
case 27:
letter = "q";
break;
case 28:
letter = "r";
break;
case 29:
letter = "s";
break;
case 30:
letter = "t";
break;
case 31:
letter = "u";
break;
case 32:
letter = "v";
break;
case 33:
letter = "w";
break;
case 34:
letter = "x";
break;
case 35:
letter = "y";
break;
case 36:
letter = "z";
break;
}
str = new RegExp("^[+\\-]?[0-9a-" + letter + "]*[.]?[0-9a-" + letter + "]*$", "gi");
}
return str;
}
var n = 50;
var shurukuang = "";
var flag = "";
function px(y) {
if ($("#input_value").val() != flag || y) {
flag = $("#input_value").val();
if ($("#input_num").selectedIndex < n) {
$("#input_value").val("");
$("#output_value").val("");
} else {
var px00 = $("#input_value").val();
var px0 = px00.match(zhengze($("#input_num").val()));
if (px0) {
if (px0[0].indexOf(".") == -1) {
var px1 = parseInt(px0, $('#input_num').val());
} else {
var px1 = pxparseFloat(px0, $('#input_num').val());
}
px1 = px1.toString($('#output_num').val());
$("#output_value").val(px1);
shurukuang = px00;
} else {
$("#input_value").val(shurukuang);
}
}
n = $("#input_num").selectedIndex;
}
if ($("#input_value").val() == "") {
$("#output_value").val("");
}
}
显示效果：进制转换器
参考文章：http://www.itmacom.com/gl/33516.html
