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<form name=hrong>
<input>
<input type=hidden>
<input type=password>
<input type=checkbox>
<input type=radio>
<select></select>
</form><SCRIPT LANGUAGE="JavaScript">
function document.onkeydown()
{
var k = window.event.keyCode;
var e = document.activeElement;
var a = document.hrong.elements;
var count = a.length;
var n = -1;
for (var i=0; i<count; i++)
{
if(a[i] == e){ n = i; break;}
}
if (n == -1) return; //说明当前网页里得到焦点的项不在表单里
if (n>0 && k == 37)
{
for(var i=n-1; i>-1; i--)
{
if(a[i].type!="hidden")
{
a[i].focus();
break;
}
}
}
}
</SCRIPT>
<form name=hrong>
<input>
<input type=hidden>
<input type=password>
<input type=checkbox>
<input type=radio>
<select></select>
</form><SCRIPT LANGUAGE="JavaScript">
function document.onkeydown()
{
var k = window.event.keyCode;
var e = document.activeElement;
var a = document.hrong.elements;
var count = a.length;
var n = -1;
for (var i=0; i<count; i++)
{
if(a[i] == e){ n = i; break;}
}
if (n == -1) return; //说明当前网页里得到焦点的项不在表单里
if (n>0 && k == 37)
{
for(var i=n-1; i>-1; i--)
{
if(a[i].type!="hidden")
{
a[i].focus();
break;
}
}
}
}
</SCRIPT>
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