JavaScript valider la date
function validatedate(inputText,DateFormat)
{
// format dd/mm/yyyy or in any order of (dd or mm or yyyy) you can write dd or mm or yyyy in first or second or third position ... or can be slash"/" or dot"." or dash"-" in the dates formats...
var invalid = "";
var dt = "";
var mn = "";
var yr = "";
var k;
var delm = DateFormat.includes("/") ? "/" : ( DateFormat.includes("-") ? "-" : ( DateFormat.includes(".") ? "." : "" ) ) ;
var f1 = inputText.split(delm);
var f2 = DateFormat.split(delm);
for(k=0;k<=2;k++)
{
dt = dt + (f2[parseInt(k)]=="dd" ? f1[parseInt(k)] : "");
mn = mn + (f2[parseInt(k)]=="mm" ? f1[parseInt(k)] : "");
yr = yr + (f2[parseInt(k)]=="yyyy" ? f1[parseInt(k)] : "");
}
var mn_days = "0-31-" + (yr % 4 == 0 ? 29 : 28) + "-31-30-31-30-31-31-30-31-30-31";
var days = mn_days.split("-");
if( f1.length!=3 || mn.length>2 || dt.length>2 || yr.length!=4 || !(parseInt(mn)>=1 && parseInt(mn)<=12) || !(parseInt(yr)>=parseInt(1900) && parseInt(yr)<=parseInt(2100)) || !(parseInt(dt)>=1 && parseInt(dt)<=parseInt(days[parseInt(mn)])) )
{
invalid = "true";
}
alert( ( invalid=="true" ? "Invalid Date" : "Valid Date") );
}
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