whts error in this program its not working

<script type="text/javascript">
function show(){
val = new Array(10)
for(i=0; i<10; i ){
val[i]=i
}
for(i=0; i<10; i ){
document.frm1.txt[i].value=val[i]
}
}

<form name="frm" ><br />
<br />
<input name="txt1" type="text" />
<input name="txt2" type="text" id="txt2" />
<input name="txt3" type="text" id="txt3" />
<input name="txt4" type="text" id="txt4" />
<input name="txt5" type="text" id="txt5" />
<p>

<input name="txt6" type="text" id="txt6" />
<input name="txt7" type="text" id="txt7" />
<input name="txt8" type="text" id="txt8" />
<input name="txt9 " type="text" id="txt9 " />
<input name="txt10" type="text" id="txt10" />
<input type="submit" name="Submit" value="Show the values" onclick="show()" /></p>
</form>

thank u ! can u give any sample or method to find unique letters in string plz....

Above code will lead to infinite loop.
You have not asked the for loop to increment the i value. it should be this way
for(i=1; i<=10;i++)
{
//your code;
}

In above loop i=1 because the name attribute values are starting with txt1 onwards. there is no txt0 and i<=10 because there is txt10 in the code.

Most important is i++ which you have not specified. i should be incremented to some value.