function check_pageNo(myForm){
  v=myForm.pageNo.value;  
  max=myForm.total_pages.value;
  var str1='Invalid page no,page no must in 1 and'+ max;
  if(isEmpty(v) || !isNumber(v)){
    myForm.pageNo.value=""
    myForm.pageNo.focus();
    alert(str1);
    return false;
  }
  s=eval(v);
  e=eval(max);
  if(s<1 || s>e){
    myForm.pageNo.value=""
    myForm.pageNo.focus();
    alert(str1);
    return false;
  }
  return true;
}
function gotopage(btn){	
	 
  if (btn.name=='btn_fpage') btn.form.pageNo.value=1;
  if (btn.name=='btn_ppage') btn.form.pageNo.value=btn.form.cur_page.value-1;
  if (btn.name=='btn_npage') btn.form.pageNo.value=eval(btn.form.cur_page.value)+1;
  if (btn.name=='btn_lpage') btn.form.pageNo.value=btn.form.total_pages.value;   
  
  if (btn.form.pageNo.value<1) btn.form.pageNo.value=1;
  if (eval(btn.form.pageNo.value)>eval(btn.form.total_pages.value)) btn.form.pageNo.value=btn.form.total_pages.value;
}