sharepeoint list Newform.aspx needs to check before saving the item, for that i wrote a PreSaveAction funtion using javascript. right now i’m checking the expiration date with current date before saving the item and it looks like this

   function PreSaveAction() {      var a1=......     var  a2=.....    if (a1<=a2){ return true; } else { window.location.href= "redirection.aspx"; return false;} 

now i need to add something to this to check the attachments (to make the attachments required) to the newform.aspx for that

    function PreSaveAction() {              var elm = document.getElementById("idAttachmentsTable");             if (elm == null || elm.rows.length == 0) {                 document.getElementById("idAttachmentsRow").style.display='none';  alert("Please attach Documents"); return false ; } else { return true ;} } 

i need to combine both the codes above in PreSaveAction function, so it should check the attachments first then check the expiration date.

Thanks in advance.