Javascript Scroller Loop Help

Ok well I figured that part out. However now -->

Everytime I click on Bold, Italic etc, in sentence 2 3 4 or whatever. The javascript command puts it in textarea 1 instead of 2 3 or 4.

How can I make it so that, if I click on Bold, Italic etc, the appropriate command will goto the appropriate textarea??

Code

<SCRIPT LANGUAGE="JavaScript">

<!-- Begin
function View(form) {
msg=open("","DisplayWindow","status=1,scrollbars=1");
msg.document.write(form.Text2.value);
}
function Generate(form) {
var txt="<html><HEAD><TITLE>"+form.Name.value+"</TITLE></HEAD>rn";
txt+="</font></body></html>";
form.Text2.value=txt;
}
function AddText(form, Action){
var AddTxt="";
var txt="";

if(Action==4) {  
txt=prompt("Text to be made BOLD.","Text");     
if(txt!=null)           
AddTxt="<b>"+txt+"</b>";        
}
if(Action==5) {  
txt=prompt("Text to be italicized","Text");     
if(txt!=null)           
AddTxt="<i>"+txt+"</i>";        
}
if(Action==6) AddTxt="rn

";
if(Action==7) AddTxt="
rn";
if(Action==8) AddTxt="<hr>rn";
if(Action==9) {  
txt=prompt("URL for the link.","http://");      
if(txt!=null){          
AddTxt="<a href="+txt+">";              
txt=prompt("Text to be show for the link","Text");              
AddTxt+=txt+"</a>rn";         
   }
}
if(Action==10) { 
txt=prompt("URL for graphic","URL");    
if(txt!=null)           
AddTxt="<img src="+txt+">rn"; 
}
if(Action==11) {  
txt=prompt("Text to be made Underline.","Text");     
if(txt!=null)           
AddTxt="<u>"+txt+"</u>";        
}

form.sent1.value+=AddTxt; 

}

// End -->
</SCRIPT>

Code

	<table border='1' width='50%' align='left' cellspacing='1' cellpadding='3'>
      <tr> 
        <td width='100' align='left'><b>$CONFIGURESENTENCE1</b></td>
        <td width='240' colspan='2'>
	<input type='button' value='Link' onClick='AddText(this.form,9);'>
	<input type='button' value='Bold' onClick='AddText(this.form,4);'>	
	<input type='button' value='Italic' onClick='AddText(this.form,5);'>
	<input type='button' value='Underline' onClick='AddText(this.form,11);'>
	</td>        
      </tr>
      <tr> 
        <td width='100' align='left'>$Sentence:</td>
        <td width='160'>           
         <textarea name='sent1' rows='7' cols='33'>$sent1</textarea>
        </td>
        <td width='225'>$expsentence</td>
      </tr>
       <tr> 
        <td width='100' align='left'><b>$CONFIGURESENTENCE2</b></td>
        <td width='240' colspan='2'>
	<input type='button' value='Link' onClick='AddText(this.form,9);'>
	<input type='button' value='Bold' onClick='AddText(this.form,4);'>	
	<input type='button' value='Italic' onClick='AddText(this.form,5);'>
	<input type='button' value='Underline' onClick='AddText(this.form,11);'>
        </td>
      </tr>