<script language="javascript" type="text/javascript">
function checkdate(txt)
{
var dtObj = 'ctl00_ContentPlaceHolder1_'+txt
var dtObj=document.getElementById(dtObj)
var dtStr=dtObj.value;
var dtTemp=dtStr;
if(dtStr=='')
{
alert('Date cant be blank')
dtObj.value=""
return false
}
if(dtTemp.indexOf('/')==-1)
{
alert('Invalid Date.\nPlease enter date in dd/mm/yyyy format.')
dtObj.value=""
return false
}
dtTemp=dtTemp.substring(dtTemp.indexOf('/')+1)
if(dtTemp.indexOf('/')==-1)
{
alert('Invalid Date.\nPlease enter date in dd/mm/yyyy format.')
dtObj.value=""
return false
}
//check for parts of date
var DayDt
var MonDt
var YearDt
dtTemp=dtStr
DayDt=dtTemp.substring(0,dtTemp.indexOf('/'))
dtTemp=dtTemp.substring(dtTemp.indexOf('/')+1)
MonDt=dtTemp.substring(0,dtTemp.indexOf('/'))
YearDt=dtTemp.substring(dtTemp.indexOf('/')+1)
if(YearDt.length!=4)
{
alert('Invalid Date.Year should be in 4-digits.')
dtObj.value=""
return false
}
//alert("Day :" + DayDt + " Mon:" + MonDt + " Year:" + YearDt)
if(isNaN(DayDt) || isNaN(MonDt) || isNaN(YearDt))
{
alert("Invalid Date.\nPlease enter date in dd/mm/yyyy format.")
dtObj.value=""
return false
}
var DateEntered=new Date()
DateEntered.setFullYear(YearDt,parseInt(MonDt)-1,DayDt)
if(DateEntered.getMonth()!=(parseInt(MonDt)-1))
{
alert("Invalid Date.\nPlease enter date in dd/mm/yyyy format.")
dtObj.value=""
return false
}
var str2 = new Date();
var s=str2.format("dd/MM/yyyy");
var dt1 = parseInt(dtStr.substring(0,2),10);
var mon1 = parseInt(dtStr.substring(3,5),10);
var yr1 = parseInt(dtStr.substring(6,10),10);
var dt2 = parseInt(s.substring(0,2),10);
var mon2 = parseInt(s.substring(3,5),10);
var yr2 = parseInt(s.substring(6,10),10);
var date1 = new Date(yr1, mon1, dt1);
var date2 = new Date(yr2, mon2, dt2);
if(date2 < date1)
{
alert("To date cannot be greater than from current date");
dtObj.value=""
return false
}
}
</script>
on page load
-------------------------
txtDateFrom.Attributes.Add("onchange", "checkdate('txtDateFrom')");
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