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Date selection, accumulate, and assign values

Source: Internet
Author: User
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<! Doctype HTML public "-// W3C // dtd xhtml 1.0 transitional // en" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<HTML xmlns = "http://www.w3.org/1999/xhtml">
<Head>
<Meta http-equiv = "Content-Type" content = "text/html; charset = gb2312"/>
<Title> untitled document </title>
</Head>

<Body>
<Form name = "form">

<Table>
<Tr>
<TD> current date: </TD>
<TD> <input type = "text" name = "U" value = "2009-01-01"> </TD>
</Tr>
<Tr>
<TD> days to add: </TD>
<TD> <input type = "text" name = "entry" id = "D" value = "" onkeyup = "Calculate ('D')"> </TD>
</Tr>
<Tr>
<TD> Number of weeks to be added: </TD>
<TD> <input type = "text" name = "entry" id = "W" value = "" onkeyup = "Calculate ('W')"> </TD>
</Tr>
<Tr>
<TD> Number of months to be added: </TD>
<TD> <input type = "text" name = "entry" id = "M" value = "" onkeyup = "Calculate ('M')"> </TD>
</Tr>
<Tr>
<TD> Number of years to be added: </TD>
<TD> <input type = "text" name = "entry" id = "Y" value = "" onkeyup = "Calculate ('y')"> </TD>
</Tr>
<Tr>
<TD> result: </TD>
<TD> <input name = "Twice"> </TD>
</Tr>
<! -- <Tr>
<TD> date to be added 2: </TD>
<TD> <input type = "text" name = "U" value = "2009/01/01"> </TD>
</Tr>
<Tr>
<TD> result 2: </TD>
<TD> <input name = "Twice"> </TD>
</Tr> -->
</Table>
</Form>
<Script language = "JavaScript">
Function dateadd (strinterval, numday, dtdate ){
VaR dttmp = new date (dtdate );
If (isnan (dttmp) dttmp = new date ();
Switch (strinterval ){
Case "S ":
Dttmp = new date (date. parse (dttmp) + (1000 * parseint (numday )));
Break;
Case "N ":
Dttmp = new date (date. parse (dttmp) + (60000 * parseint (numday )));
Break;
Case "H ":
Dttmp = new date (date. parse (dttmp) + (3600000 * parseint (numday )));
Break;
Case "D ":
Dttmp = new date (date. parse (dttmp) + (86400000 * parseint (numday )));
Break;
Case "W ":
Dttmp = new date (date. parse (dttmp) + (86400000*7) * parseint (numday )));
Break;
Case "M ":
Dttmp = new date (dttmp. getfullyear (), (dttmp. getmonth () + parseint (numday), dttmp. getdate (), dttmp. gethours (), dttmp. getminutes (), dttmp. getseconds ());
Break;
Case "Y ":
// Alert (dttmp. getfullyear ());
Dttmp = new date (dttmp. getfullyear () + parseint (numday), dttmp. getmonth (), dttmp. getdate (), dttmp. gethours (), dttmp. getminutes (), dttmp. getseconds ());
// Alert (dttmp );
Break;
}
VaR mstr = new string (dttmp. getmonth () + 1 );
VaR dstr = new string (dttmp. getdate ());
If (mstr. Length = 1 ){
Mstr = "0" + mstr;
}
If (dstr. Length = 1 ){
Dstr = "0" + dstr;
}
Return dttmp. getfullyear () + "-" + mstr + "-" + dstr;
}
</SCRIPT>
<Script language = "JavaScript">

Function calculate (type)
{
VaR entry = Document. getelementbyid (type). value; // you can determine whether the value is valid.
VaR uvalue = Document. Form. U. value;
Uvalue = uvalue. Replace ("-", "/"). Replace ("-","/");
// Alert (uvalue );
Document. Form. Twice. value = dateadd (type, entry, uvalue );
}
</SCRIPT>

</Body>
</Html>

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