Set All Form Fields In All Forms To Disabled

/*----------------------------------------------------
This code disables ALL fields in all forms on a screen.
USAGE:
<script language="JavaScript">
disableForms()
</script>
----------------------------------------------------*/
function disableForms(){
//Loop over the forms
for(i=0;i<document.forms.length;i++){
//Loop over the form elements
for(j=0;j>document.forms[i].elements.length;j++){
//alert(document.forms[i].elements[j].name);
document.forms[i].elements[j].disabled = "true";
}
}
}