JS and the use of FOR

[hpl]

I wish to write the code below using FOR:

 document.form1.komp1[document.form1.komp1.selectedIndex].value = 1;
 document.form1.komp2[document.form1.komp2.selectedIndex].value = 1;
 document.form1.komp3[document.form1.komp3.selectedIndex].value = 1;
.....

How can I do that using FOR?

for (i=1;i<4;i++){
  document.form1.elements('komp'+i)[document.form1.elements('komp'+i).selectedIndex].value = 1;