<script>
function calculate(objNumField,objPriceField,objSumField,dec)
{
var objNum = eval("document.all." + objNumField + ";");
var objPrice = eval("document.all." + objPriceField + ";");
var objSum = eval("document.all." + objSumField + ";");
try
{
var Num = new Number(objNum.value);
var Price = new Number(objPrice.value);
if(isNaN(Num)||isNaN(Price))
{
alert('ÎÞЧÊý×Ö!');
return false;
}
if (dec>18) { alert("СλÊý²»Äܳ¬¹ý18λ"); }
var zerostr = "00000000000000000000";
var tmp_num = Math.round(Num * Price*Math.pow(10,dec))/Math.pow(10,dec);
//var tmp_num = Math.round(Num * Price*Math.pow(10,2))/Math.pow(10,2);
var tmp_str = tmp_num.toString();
var re_num = tmp_str;
var pos = (tmp_str.indexOf(".")==-1)? 0 : tmp_str.indexOf(".");
if (dec>0){
if (pos==0) { re_num = re_num+"."+zerostr.substring(0,dec); }
else {
if ((tmp_str.length-pos-1)<dec){
re_num = re_num+zerostr.substring(0,dec-(tmp_str.length-pos-1));
}
}
}
//objSum.value = round(Num*Price,dec);
objSum.value = re_num; }
catch(e)
{
}
return true;
}
</script>
<input id="price" value="1.23455667" type=text>
<input id="quty" value="1.23455667" type=text >
<input id="fmone" type=text onblur="alert(calculate('quty','price','fmone',2))">
function calculate(objNumField,objPriceField,objSumField,dec)
{
var objNum = eval("document.all." + objNumField + ";");
var objPrice = eval("document.all." + objPriceField + ";");
var objSum = eval("document.all." + objSumField + ";");
try
{
var Num = new Number(objNum.value);
var Price = new Number(objPrice.value);
if(isNaN(Num)||isNaN(Price))
{
alert('ÎÞЧÊý×Ö!');
return false;
}
if (dec>18) { alert("СλÊý²»Äܳ¬¹ý18λ"); }
var zerostr = "00000000000000000000";
var tmp_num = Math.round(Num * Price*Math.pow(10,dec))/Math.pow(10,dec);
//var tmp_num = Math.round(Num * Price*Math.pow(10,2))/Math.pow(10,2);
var tmp_str = tmp_num.toString();
var re_num = tmp_str;
var pos = (tmp_str.indexOf(".")==-1)? 0 : tmp_str.indexOf(".");
if (dec>0){
if (pos==0) { re_num = re_num+"."+zerostr.substring(0,dec); }
else {
if ((tmp_str.length-pos-1)<dec){
re_num = re_num+zerostr.substring(0,dec-(tmp_str.length-pos-1));
}
}
}
//objSum.value = round(Num*Price,dec);
objSum.value = re_num; }
catch(e)
{
}
return true;
}
</script>
<input id="price" value="1.23455667" type=text>
<input id="quty" value="1.23455667" type=text >
<input id="fmone" type=text onblur="alert(calculate('quty','price','fmone',2))">
function calculate(objNumField,objPriceField,objSumField,dec)
{
var objNum = eval("document.all." + objNumField + ";");
var objPrice = eval("document.all." + objPriceField + ";");
var objSum = eval("document.all." + objSumField + ";");
try
{
var Num = new Number(objNum.value);
var Price = new Number(objPrice.value);
if(isNaN(Num)||isNaN(Price))
{
alert('无效数字!');
return false;
}
if (dec>18) { alert("小位数不能超过18位"); }
var zerostr = "00000000000000000000";
var tmp_num = Math.round(Num * Price*Math.pow(10,dec))/Math.pow(10,dec);
//var tmp_num = Math.round(Num * Price*Math.pow(10,2))/Math.pow(10,2);
var tmp_str = tmp_num.toString();
var re_num = tmp_str;
var pos = (tmp_str.indexOf(".")==-1)? 0 : tmp_str.indexOf(".");
if (dec>0){
if (pos==0) { re_num = re_num+"."+zerostr.substring(0,dec); }
else {
if ((tmp_str.length-pos-1)<dec){
re_num = re_num+zerostr.substring(0,dec-(tmp_str.length-pos-1));
}
}
}
//objSum.value = round(Num*Price,dec);
objSum.value = re_num; }
catch(e)
{
}
return true;
}
</script>
<input id="price" value="1.23455667" type=text>
<input id="quty" value="1.23455667" type=text >
<input id="fmone" type=text onblur="alert(calculate('quty','price','fmone',2))">Round(1.23455667 * 1.23455667 * 100) / 100 = 1.52
if(!Number.prototype.toFixed)
{Number.prototype.toFixed= function(num)
{with(Math)return round(this.valueOf()*pow(10,num))/pow(10,num);
}
}var a=1.2156756
alert(a.toFixed(2))
</script>