页面出错,javascript出现问题,向高手求教
页面上有一个一行一列的table(其他按钮,文本框之类的请无视),希望按下时向后台传值,具体看下面代码中的doAction()   这个方法。在执行到submit时提示页面错误(页面左下角出现黄色惊叹号),说对象不支持此属性或方法。document.forms[0].submit();submit本身语法不应该有错误的。现在完全搞不清状况了。求救。     
  <html   lang= "zh ">  
        <head>  
              <title> Hello   -   A   first   Struts   program </title>  
              <base   href= "http://localhost:8088/helloapp/ ">  
  <script   language= "JavaScript "   type= "text/JavaScript ">  
  <!-- 
 function   mOver(obj){ 
 	obj.parentElement.rows(obj.sectionRowIndex).style.backgroundColor= 'lightblue '; 
 } 
 function   mOut(obj){ 
 	obj.parentElement.rows(obj.sectionRowIndex).style.backgroundColor= ' '; 
 } 
 function   doAction(obj){ 
 	if(obj.name   ==    "searchList "){ 
 		document.forms[0].ukechuBmCd.value   =   obj.cells(1).innerText; 
 		document.forms[0].comotoBmCd.value   =   obj.cells(2).innerText; 
 		document.forms[0].shiiresakiCd.value   =   obj.cells(3).innerText; 
 		alert(document.forms[0].ukechuBmCd.value); 
 		alert(document.forms[0].comotoBmCd.value); 
 		alert(document.forms[0].shiiresakiCd.value); 
 	} 
 	document.forms[0].actionType.value   =    "list "; 
 	alert( "submit "); 
 	document.forms[0].submit(); 
 } 
 function   submitAction(actionType)   { 
 		document.forms[0].actionType.value   =   actionType; 
 		document.forms[0].submit(); 
 }   
 -->           
  </script>  
        </head>  
        <body   bgcolor= "white ">  <p>    
              <h2> Hello   World!   A   first   Struts   application </h2>  <p>    
           <p>                     
              <form   name= "HelloForm "   method= "post "   action= "/helloapp/HelloWorld.do; ">  
 	 <input   type= "hidden "   name= "actionType "   value= " ">  
 	 <input   type= "hidden "   name= "ukechuBmCd "   value= " ">  
 	 <input   type= "hidden "   name= "comotoBmCd "   value= " ">  
 	 <input   type= "hidden "   name= "shiiresakiCd "   value= " ">  
                   Please   enter   a   UserName   to   say   hello   to   : 
                    <input   type= "text "   name= "userName "   maxlength= "16 "   size= "16 "   value= " ">  <br>  
                    <input   type= "submit "   name= "submit "   value= "Submit "   onclick= "javascript:submitAction( 'submit ') ">  
                    <input   type= "reset "   value= "Reset ">  
                    <input   type= "submit "   name= "next "   value= "nextpage "   onclick= "javascript:submitAction( 'next ') ">