help in subtracting dates please....

[kid]

hi, i need help i want to subtact 30 days from current date. here is my sample code but its not working.

var currentTime = new Date()
var month = currentTime.getMonth() + 1
var day = currentTime.getDate() - 30
var year = currentTime.getFullYear()
var ddownload = month + "-" + day + "-" + year
 
document.write(ddownload)
 

the sample date today : 08-09-2007
but when i subtracted 30 days from date today the output is : 8--21-2007

please can anyone help me? thanks.

[r035198x]

hi, i need help i want to subtact 30 days from current date. here is my sample code but its not working.

var currentTime = new Date()
var month = currentTime.getMonth() + 1
var day = currentTime.getDate() - 30
var year = currentTime.getFullYear()
var ddownload = month + "-" + day + "-" + year

document.write(ddownload)

the sample date today : 08-09-2007
but when i subtracted 30 days from date today the output is : 8--21-2007

please can anyone help me? thanks.

This is not Java. Moved to Javascript forum.

[acoder]

Please use CODE tags when posting code.

9 - 30 = -21 (that's why you're getting -21)

To solve this problem, use the setDate() method:

currentTime.setDate(currentTime.getDate()-30);

Get the day, month and year values after setting the date.