set session value to dropdown in jsp

<![CDATA[<%
int session_val = (Integer)session.getAttribute("case_type");%>]]> 

function addOption(selectbox,text,value )
{
	var optn = document.createElement("OPTION");
	optn.text = text;
	optn.value = value;
	selectbox.options.add(optn);
}

function addOption_list(){
	 objcasesubtype =  document.getElementById("case_subtype");
	 var session_sub= '<%=session_subtype%>';
	 
    	 casesubtype = new Array("Bail Application","Anticipatory Bail Application","Criminal Appeal","Acquittal Appeal","Transfer Petition");
     
	objcasesubtype.options.length = 0;
		
		 
for (var i=0; i < casesubtype.length;++i){
	addOption(document.addcase.case_subtype, casesubtype[i], casesubtype[i]);}

for(var x=0;x <=objcasesubtype.length ; x++)
{
   if(session_sub == objcasesubtype.options[x].value)
	   objcasesubtype.selectedIndex = x;
};