VBA clicking Onclick button in webpage 'which contains Validate function'

Hi Experts,

Iam working on a project ''Automation IE'' need help on the same.
I am trying to spool one excel report from website by giving From date and To Date are as inputs iam able to give enter dates with my code but iam unable click on generate button.. Any help greatly appreciated.


Below is the HTML source code for from & To dates

HTML Code:

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<input name="ctl00$ContentPlaceHolder1$txt_0" type="text" maxlength="10" id="txt_0" tabindex="1"class="watermarked" width="200px" selectionstart="txt_0" onchange="isDate2(this)" style="width: 200px;Height:20px;" autocomplete="off">

<input name="ctl00$ContentPlaceHolder1$txt_1" type="text" maxlength="10" id="txt_1" tabindex="2"class="watermarked" width="200px" selectionstart="txt_1" onchange="isDate2(this)" style="width: 200px;Height:20px;" autocomplete="off">

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Below is the HTML source code for Export Report Button

HTML Code:

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<input type="submit" name="ctl00$ContentPlaceHolder1$btnExportXLS" value="Export Report" onclick="if(!Validate()) return false;" id="btnExportXLS" tabindex="3"class="button blue" onmousedown="return isTxtwithfocus(event, this)" style="width:101px;float: none; margin-top: 2px;">

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And this is Function code

HTML Code:

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function ValidateForm(src){
assignvalue()
var src1 = document.getElementById("txt"+ src);

if(src1.value !='') {

if(isDate2(src1.value,"txt_"+ src)==false){
returnfalse
}
returntrue}
}


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This is my VBA code- Last two lines for click export button

Code:

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Sub User_Wise_Productivity()

Dim From_Date AsString
Dim To_Date AsString


From_Date = InputBox("Enter report From date in (Ex: DD.MM.yyy)format")
To_Date = InputBox("Enter report To date in (Ex: DD.MM.yyy)format")


Set browser = CreateObject("internetexplorer.application")
browser.Visible =True
browser.navigate ("My URL")


Do
DoEvents
LoopUntil browser.readyState =4


browser.document.getElementById("txtUserName").Value ="Myid"
browser.document.getElementById("txtPassword").Value =“Mypsw”

browser.document.getElementById("selFund").selectedIndex ="21"
browser.document.getElementById("btnSubmit").Click

Do
DoEvents
LoopUntil browser.readyState <>4




browser.navigate ("MY URL Page2")

Do
DoEvents
LoopUntil browser.readyState <>4


Dim reprt AsString
reprt ="11"


    With browser
        Set Post =.document.getElementById("ddlrptlist")
      ForEach elem In Post.getElementsByTagName("option")
            If elem.Value = reprt Then elem.Selected =True:ExitFor
        Next elem

  .document.getElementById("ddlrptlist").FireEvent ("onchange")

    EndWith

Do
DoEvents
LoopUntil browser.readyState <>4

browser.document.getElementById("txt_0").Value = From_Date
browser.document.getElementById("txt_1").Value = To_Date

Application.Wait (Now + TimeValue("0:00:02"))

browser.document.getElementById("btnExportXLS").Focus
browser.document.getElementById("btnExportXLS").Click


EndSub

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