一个无重复排序的js

<script language="javascript">
<!--
function setValue(element,elementValue){
with(document.updatePhoto){
if(//D/.test(elementValue)){
alert("Minimum 1 - maximum 20 char long.");
reset();
}
else if(parseInt(eval(element).value) > parseInt(recordCount.value)){
alert("Maximum 20 char long.'"+ recordCount.value);
eval(element).focus();
}
else if(parseInt(elementValue) == 0){
alert("Minimum 1 - maximum 20 char long.");
reset();
}
for(var i = 0; i < parseInt(recordCount.value);i++){
var swapName = eval(element.split("_")[0] + "_" + i);//取得将用于交互的对象"photoOrder_" + i
var swapValue =swapName.value;//取得将用于交互的元素"photoOrder_" + i 的值
var currentHiddenName = eval(element + "_value");//取得当前所修改元素的隐藏对象photoOrder_" + i + "_value"
var currentHiddenValue = currentHiddenName.value;//当前所修改元素的隐藏对象的原值
var swapHiddenName = eval(element.split("_")[0] + "_" + i + "_value");//取得交互元素的隐藏对象photoOrder_" + i + "_value"
var swapHiddenValue = swapHiddenName.value;//交互元素的隐葳对象的原值
if(swapName != eval(element) && swapValue==elementValue){
swapName.value = currentHiddenValue;
currentHiddenName.value = swapHiddenValue
swapHiddenName.value = currentHiddenValue;
}
}
}
}
//-->
</script>