<script>
alert('1235455435')
function AddComma(numArg) {
var reg = /(-?\d+)(\d{3})/
numArg+=''
while (reg.test(numArg)) {
numArg=numArg.replace(reg, "$1,$2")
}
return numArg
}
alert(AddComma('1235455435'))
</script>
alert('1235455435')
function AddComma(numArg) {
var reg = /(-?\d+)(\d{3})/
numArg+=''
while (reg.test(numArg)) {
numArg=numArg.replace(reg, "$1,$2")
}
return numArg
}
alert(AddComma('1235455435'))
</script>
比如说:
str=1.2466
formatNumber(str,2)=1.27
<script>
function formatNumber(num,n){
return Math.round(num.toString()*Math.pow(10,n))/Math.pow(10,n)
}
alert(formatNumber(3.1415926,2))
</script>
<script>
function formatNumber(num,n){
return Math.round(num*Math.pow(10,n))/Math.pow(10,n)
}
alert(formatNumber(3.1415926,2))
</script>