Hi i want to call one apex method when an checkbox is clicked , 
My requirmnet is i have 2 vf pages and one controller.
in 1sr vf page when usere inserts 2 dates fileds and after that command button (submit) i am displaying custom report (data table).clicks exprot link i am passing the selected dates values to the same apex controller. to another vf page and i am getting correct result. 
now the requirmnet is after displaying the datatable there is one checkbox , when checkbox is checked in Vf page,i  want to make check in the Sobject record,(that i can do it), the main problem is i wnat to pass this check box also in the argument.

My VF code:
 

<a href="/apex/SalesOrderSAPReportInExcel?fDate={!fDateStr}&tDate={!tDateStr}&chkbox={!StoreSelectCheckBox} " target="_blank" >
Export Here
</a>

public SalesOrderReportGenerator(ApexPages.StandardController stdController) {
      
         String Dtext = System.currentPageReference().getParameters().get('Dtext');
        String fDate = System.currentPageReference().getParameters().get('fDate');
        String tDate = System.currentPageReference().getParameters().get('tDate'); 
     String chkbox=System.currentPageReference().getParameters().get('chkbox');
  
       system.debug('*************:'+ chkboxs);
       If(fDate != null && tDate != null){
       
        
            fromDate = Date.valueOf(fDate);
            toDate = Date.valueOf(tDate);
          
              
       SelectCheckBox=Boolean.valueof(chkbox);
}

Submit function method:

public pageReference SalesOrderReportData() {
    
        StoreSelectCheckBox=SelectCheckBox;
;
;
;
}

I can achive this only when checkbox checked and again subbmit commmad butoon called.
===

in simple words i want to call call apex command button when checkbox is check how to achive this pls tell me