var bookAmount=4 ;

var bookStatus=new Array() ;

for (i=0; i<bookAmount ; i++){
	bookStatus[i]="close"; }




function ViewList(id){

for(i=0; i<bookAmount ; i++){
		if(id==i){
			if(bookStatus[i]=="close"){
				document.getElementById('essay_List'+i).style.display="block";  
				bookStatus[i]="open" ; 
				iframe_essay.location.href="essay_book_"+i+".html" ; }
			else if(bookStatus[i]=="open"){
				document.getElementById('essay_List'+i).style.display="none";  
				bookStatus[i]="close" ; }
			}

		else {
			document.getElementById('essay_List'+i).style.display="none";  
			bookStatus[i]="close" ; }

		}//end of for
return bookStatus ;
} //End of function


function subNav2Roll(over_out,id) {

	if(over_out=="over"){
			document.getElementById('book_title'+id).style.color="rgb(200,0,0)" ; }
	else if(over_out=="out"){
			document.getElementById('book_title'+id).style.color="rgb(0,0,0)" ; }

}//end of function