Java script超初心者ですが質問があります。

<input type=button value="Roll" onClick='

var randomValue;
randomValue= Math.floor(Math.random()*6)+1;
document.myForm.ValueofDice.value=randomValue;

var totalNumberOfRolls;
totalNumberOfRolls=parseInt(document.myForm.totalrolls.value);
document.myForm.totalrolls.value=totalNumberOfRolls+1;

if(randomValue==1)
{
var 1rolll;
1rolll=parseInt(document.myForm.1isrolled.value);
document.myForm.1isrolled.value=1rolll+1;
}
if(randomValue==6)
{
var 6rolll;
6rolll=parseInt(document.myForm.6isrolled.value);
document.myForm.6isrolled.value=6rolll+1;
}

'>