<!--
function validate (){
// traditional
tnr=document.forminput.tnr.value;//course days
ttn=document.forminput.ttn.value;//nr of teachers
ttc=document.forminput.ttc.value;//teacher cost per day
tsc=document.forminput.tsc.value;//student cost per day
ts=document.forminput.ts.value;//nr of students
tac=document.forminput.tac.value;//accomodation cost per day
ttrc=document.forminput.ttrc.value;//travel cost per day
tpc=document.forminput.tpc.value;//printing per student per course
tcc=document.forminput.tcc.value;//classroom cost per day
tadc=document.forminput.tadc.value;//admin days per student
tdt=document.forminput.tdt.value;//devt day per course day
// elearning
enr=document.forminput.enr.value;//course days
etn=document.forminput.ttn.value;//nr of teachers
eadc=document.forminput.eadc.value;//admin days per student
edt=document.forminput.edt.value;//devt day per course day
emc=document.forminput.emc.value;//coaching days per course day
ecc=document.forminput.ecc.value;//communic costs per course day
ecomp=document.forminput.ecomp.value;//computer purchase
m1="Are you sure that the development costs of the E-Learning system are well estimated. Usually it is more that the double of a traditional approach";
m2=" Usually one needs less course days in an E-Learning environment, between 50 % and 70 %, please relook at your assumptions. The E-Learning approach is more effective, if the design is good. ";

if (edt<2*tdt){alert(m1)};
if (enr>tnr*.7){alert (m2)}; 

// cost traditional
//teacher costs+student costs+travel costs+accom costs+print costs+classromm costs+admin costs + development costs
tresu=tnr*ttn*ttc+tnr*tsc*ts+ttrc*tnr*(ts+ttn)+ tac*tnr*(ts+ttn)+tpc*ts+tcc*tnr+tadc*ts*ttc/8 +tdt*tnr*ttc;
document.forminput.tres.value=Math.round(tresu);

//cost e-learning
// student costs + coaching costs+ communic costs+admin costs + development costs
eresu=enr*tsc*ts+emc*ts*enr/8 + ecc*ts*enr +eadc*enr*ts/8+ enr*edt*ttc+ ecomp/800*enr*ts;
document.forminput.eres.value=Math.round(eresu);
document.forminput.saving.value=Math.round(tresu-eresu);
if ((tresu-eresu)>0){
percent=Math.round(100*(tresu-eresu)/tresu)} else(percent=" Sorry,no savings");
document.forminput.percent.value=percent;
}
// -->