Text field names and updates

[hpl]

I have three text fields with the names

<input type=text name=t1 onclick="test();">
<input type=text name=t2>
<input type=text name=t3>

when I click the first field I wish to set the value of all the three text fields with a function. I have tried the code below, but I can't make it work? Any ideas?

function test1(){
for (i=1;i<4; i++){
	document.formName.t + i + .value=25;
}