<script src="http://script2.pingan.com/app_js/ui30/js/jquery-1.3.2.js" language="javascript"></script>
<script type="text/javascript">
$(function(){
var countSize;
//数字按钮
$("#buttons input.num").click(function(){
var numVal = $(this).val();
//判断初始值为0的时候,只有输入小数点才追加,否则覆盖
if( $("#display #down").text() == "0" ){
if( numVal == "." ){
$("#display #down").append(numVal);
}else{
$("#display #down").text(numVal);
}
}
//使输入框里只能有一个小数点
else if( $("#display #down").text().indexOf(".") > 0 ){
if( numVal == "." ){
}else{
$("#display #down").append(numVal);
}
}else if( $("#display #down").text() == "" && numVal == "." ){
$("#display #down").text("0").append(numVal);
}
else{
$("#display #down").append(numVal);
}
})
//加减乘除按钮
$("#buttons input.math").click(function(){
var upNum = $("#display #up .upNum").text();
var upMath = $("#display #up .countSize").text();
var downNum = $("#display #down").text();
if( upNum.length !== 0 && downNum.length !== 0 && upMath.length !== 0 ){
countSize = $("#display #up .countSize").text();
var upNum = $("#display #up .upNum").text();
var downNum = $("#display #down").text();
//如果a或b中有空值,则跳出此函数
if( upNum == "" || downNum == "" ){return false;}
var resultNum = count[countSize](upNum,downNum);
$("#display #up .upNum").text(resultNum);
countSize = $(this).val();
$("#display #up .countSize").text(countSize);
$("#display #down").text("");
}else{
countSize = $(this).val();
$("#display #up")
.text(downNum)
.wrapInner('<span class="upNum" /></span>')
.append('<span class="countSize">' + countSize + '</span>');
$("#display #down").text("");
}
})
//等于按钮
$("#buttons input.equal").click(function(){
var upNum = $("#display #up .upNum").text();
var downNum = $("#display #down").text();
//如果a或b中有空值,则跳出此函数
if( upNum == "" || downNum == "" ){return false;}
var resultNum = count[countSize](upNum,downNum);
$("#display #down").text(resultNum);
$("#display #up").text("");
})
//重置按钮
$("#buttons input.clearDisplay").click(function(){
$("#display #up").text("");
$("#display #down").text("0");
})
//加减乘除的方法
var count = {
'+': function(a,b){return accAdd(a,b);},
'-': function(a,b){return accSub(a,b);},
'*': function(a,b){return accMul(a,b);},
'/': function(a,b){return accDiv(a,b);}
}
/* ---------------- JS浮点数运算重置 ---------------- */
//加法函数
//调用:accAdd(arg1,arg2)
//返回值:arg1加上arg2的精确结果
function accAdd(arg1,arg2){
var r1,r2,m;
try{r1=arg1.toString().split(".")[1].length}catch(e){r1=0}
try{r2=arg2.toString().split(".")[1].length}catch(e){r2=0}
m=Math.pow(10,Math.max(r1,r2));
return (arg1*m+arg2*m)/m;
}
//减法函数
//调用:accSub(arg1,arg2)
//返回值:arg1减去arg2的精确结果
function accSub(arg1,arg2){
var r1,r2,m,n;
try{r1=arg2.toString().split(".")[1].length}catch(e){r1=0}
try{r2=arg1.toString().split(".")[1].length}catch(e){r2=0}
m=Math.pow(10,Math.max(r1,r2));
//last modify by deeka
//动态控制精度长度
n=(r1>=r2)?r1:r2;
return ((arg1*m-arg2*m)/m).toFixed(n);
}
//乘法函数
//调用:accMul(arg1,arg2)
//返回值:arg1乘以arg2的精确结果
function accMul(arg1,arg2)
{
var m=0,s1=arg1.toString(),s2=arg2.toString();
try{m+=s1.split(".")[1].length}catch(e){}
try{m+=s2.split(".")[1].length}catch(e){}
return Number(s1.replace(".",""))*Number(s2.replace(".",""))/Math.pow(10,m);
}
//除法函数
//调用:accDiv(arg1,arg2)
//返回值:arg1除以arg2的精确结果
function accDiv(arg1,arg2){
var t1=0,t2=0,r1,r2;
try{t1=arg1.toString().split(".")[1].length}catch(e){}
try{t2=arg2.toString().split(".")[1].length}catch(e){}
with(Math){
r1=Number(arg1.toString().replace(".",""));
r2=Number(arg2.toString().replace(".",""));
return (r1/r2)*pow(10,t2-t1);
}
}
})
</script>