<!-- hide this script tag's contents from old browsers

function ClearForm(form){

    form.imps.value = "";
    form.filesz.value = "";
    form.tmb.value = "";
    form.pkg.value = "";

}

function tmb(imps, filesz) {

          tmbndx=imps*eval(filesz/1024);
          return tmbndx;
}

function checkform(form) {

       if (form.imps.value==null||form.imps.value.length==0 || form.filesz.value==null||form.filesz.value.length==0){
            alert("\nFormu tam olarak doldurunuz.");
            return false;
       }

       else if (parseFloat(form.filesz.value) <= 0||
                parseFloat(form.filesz.value) >=500000000||
                parseFloat(form.imps.value) <= 0||
                parseFloat(form.imps.value) >=500000000){
                alert("\nDegerleri tamsayi olarak giriniz.");
                ClearForm(form);
                return false;
       }
       return true;

}

function computeform(form) {

       if (checkform(form)) {

       yourtmb=Math.round(tmb(form.imps.value, form.filesz.value));
       form.tmb.value=yourtmb;

   
       }
       return;
}
 // -- done hiding from old browsers -->