的JavaScript在IE瀏覽器，但不能在Firefox工作

Question

function onLoadMoneyEarned(size){ 
    for(var i=1;i<=size;i++){ 
     var countStr1 = 'howOften__JB1_'+i; 
     var countStr2 = 'howOften__JB2_'+i; 
     var countStr3 = 'howOften__JB3_'+i; 
     var countStr4 = 'howOften__JB4_'+i; 

     var hrsPerWeek1 = 'hrsPerWeek__JB1_'+i 
     var hrsPerWeek2 = 'hrsPerWeek__JB2_'+i 
     var hrsPerWeek3 = 'hrsPerWeek__JB3_'+i 
     var hrsPerWeek4 = 'hrsPerWeek__JB4_'+i 

     var dropDownValue1 = document.getElementById(countStr1).value; 
     var dropDownValue2 = document.getElementById(countStr2).value; 
     var dropDownValue3 = document.getElementById(countStr3).value; 
     var dropDownValue4 = document.getElementById(countStr4).value; 

     var textbox1 = document.getElementById(hrsPerWeek1); 
     textbox1.disabled = true; 
     var textbox2 = document.getElementById(hrsPerWeek2); 
     textbox2.disabled = true; 
     var textbox3 = document.getElementById(hrsPerWeek3); 
     textbox3.disabled = true; 
     var textbox4 = document.getElementById(hrsPerWeek4); 
     textbox4.disabled = true; 

     if(dropDownValue1=="HR"){ 
      textbox1.disabled = false; 
     } 
     if(dropDownValue2=="HR"){ 
      textbox2.disabled = false; 
     } 
     if(dropDownValue3=="HR"){ 
      textbox3.disabled = false; 
     } 
     if(dropDownValue4=="HR"){ 
      textbox4.disabled = false; 
     } 
    } 

這是一個工作在IE ..

我打電話這樣

<script language="javascript" type="text/javascript"> 
$(window).load(function(){onLoadMoneyEarned("<%=nameLength%>");}); 
</script> 

腳本這個腳本的主要功能是使小時文本字段只有當我們選擇每小時在旁邊的下拉菜單中。但它在Firefox中丟失驗證錯誤

任何幫助讚賞