<!--
function nav(direction) {
  pages = new Array(
	 "index",
	 "index2",
	 "audience",
	 "instructions",
	 "contributors",
	 "structurepages/strucprocess",
	 "wordorder/wointroduction",
	 "wordorder/wo02grammatical",
	 "wordorder/wo03deviations",
	 "wordorder/wo04interruption",
	 "wordorder/wo05long",
	 "wordorder/wo06researchfindings",
	 "wordorder/wo07extent",
	 "wordorder/wo08long",
	 "wordorder/wo09guided",
	 "wordorder/wo10judging",
	 "wordorder/wo11actionsteps",
	 "articles-nouns/an01Introduction",
	 "articles-nouns/an02grammatical",
	 "articles-nouns/an03count",
	 "articles-nouns/an04singular",
	 "articles-nouns/an05specific",
	 "articles-nouns/an06known",
	 "articles-nouns/an07selections",
	 "articles-nouns/an08guidedpractice",
	 "articles-nouns/an09guidedpractice",
	 "articles-nouns/an10guidedpractice",
	 "articles-nouns/an11guidedpractice",
	 "articles-nouns/an12guidedpractice",
	 "articles-nouns/an13guidedpractice",
	 "articles-nouns/an14guidedpractice",
	 "articles-nouns/an16actionsteps",
	 "passivevoice/psintroduction",
	 "passivevoice/ps02grammatical",
	 "passivevoice/ps03structure",
	 "passivevoice/ps04useof",
	 "passivevoice/ps05agents",
	 "passivevoice/ps06stative",
	 "passivevoice/ps07stative2",
	 "passivevoice/ps08stative3",
	 "passivevoice/ps09research",
	 "passivevoice/ps10comprehension",
	 "passivevoice/ps11production",
	 "passivevoice/ps12implications",
	 "passivevoice/ps13guided",
	 "passivevoice/ps14stative",
	 "passivevoice/ps15simplyfying",
	 "passivevoice/ps16actionsteps",
	 "passivevoice/ps17specific",
	 "ed-ing_participles/ed01Introduction",
	 "ed-ing_participles/ed02grammaticalsummary",
	 "ed-ing_participles/ed03verbformation",
	 "ed-ing_participles/ed04confusion",
	 "ed-ing_participles/ed05charemotional",
	 "ed-ing_participles/ed06participles",
	 "ed-ing_participles/ed07using",
	 "ed-ing_participles/ed08guided-01",
	 "ed-ing_participles/ed09guided-02",
	 "ed-ing_participles/ed10guided-03",
	 "ed-ing_participles/ed11guided-04",
	 "ed-ing_participles/ed12actionsteps",
	 "whquestionpages/whqintro",
	 "whquestionpages/whgsdescription",
	 "whquestionpages/whgswdorder",
	 "whquestionpages/whgswhqtypes",
	 "whquestionpages/whgsgaps",
	 "whquestionpages/whgsotherstruct",
	 "whquestionpages/whresearchfindings",
	 "whquestionpages/whidentifying",
	 "whquestionpages/whproducing",
	 "whquestionpages/whjudging",
	 "whquestionpages/whimplications",
	 "whquestionpages/whresearchimplications",
	 "whquestionpages/whactionsteps",
	 "readingcomp/rc01intro",
	 "readingcomp/rc02whatis",
	 "readingcomp/rc03before",
	 "readingcomp/rc04during",
	 "readingcomp/rc05after",
	 "readingcomp/rc06action",
	 "readingwritingcontent/rwIntroduction",
	 "readingwritingcontent/rw2incorporatingreading",
	 "readingwritingcontent/rw3duringreadingactiv",
	 "readingwritingcontent/rw4afterreading",
	 "readingwritingcontent/rw5otheractivities",
	 "readingwritingcontent/rw6vocabbuilding",
	 "paragraphstructure/pgs01intro",
	 "paragraphstructure/pgs02tpsnt",
	 "paragraphstructure/pgs03plc",
	 "paragraphstructure/pgs04body",
	 "paragraphstructure/pgs05conc",
	 "paragraphstructure/pgs06rhet",
	 "paragraphstructure/pgs07fnd",
	 "paragraphstructure/pgs08guided_1",
	 "paragraphstructure/pgs08guided_2",
	 "paragraphstructure/pgs08guided_3",
	 "paragraphstructure/pgs09action",
	 "essaystructure/es01intro",
	 "essaystructure/es02essay",
	 "essaystructure/es03intropara",
	 "essaystructure/es04concpara",
	 "essaystructure/es05essaysample",
	 "essaystructure/es06fnd",
	 "essaystructure/es07guided_1",
	 "essaystructure/es08action",
	 "referencewords/refw01intro",
	 "referencewords/refw02parts",
	 "referencewords/refw03direction",
	 "referencewords/refw04antecedents",
	 "referencewords/refw05overview",
	 "referencewords/refw06find.html",
	 "referencewords/refw07guided_1",
	 "referencewords/refw07guided_2",
	 "referencewords/refw07guided_3",
	 "referencewords/refw10action",
	 "expressinglogical/el01intro",
	 "expressinglogical/el02grammatical",
	 "expressinglogical/el03logicalrelat",
	 "expressinglogical/el04opp",
	 "expressinglogical/el05time",
	 "expressinglogical/el06reason",
	 "expressinglogical/el07conditional",
	 "expressinglogical/el08example",
	 "expressinglogical/el09guided_1",
	 "expressinglogical/el10guided_2",
	 "expressinglogical/el11guided_3",
	 "expressinglogical/el12guided_4",
	 "expressinglogical/el13guided_5",
	 "expressinglogical/el14guided_6",
	 "expressinglogical/el15guided_7",
	 "expressinglogical/el16guided_8",
	 "expressinglogical/el17guided_9",
	 "expressinglogical/el18guided_10",
	 "expressinglogical/el19guided_11",
	 "expressinglogical/el20guided_12",
	 "expressinglogical/el21guided_13",
	 "expressinglogical/el22actionsteps",
	 "logicalsubjects/lsintroduction",
	 "logicalsubjects/ls02grammatical",
	 "logicalsubjects/ls03inherent",
	 "logicalsubjects/ls04assignedfromoutside",
	 "logicalsubjects/ls05passivesentence",
	 "logicalsubjects/ls06infinitiveshowpurpose",
	 "logicalsubjects/ls07researchimplications",
	 "logicalsubjects/ls08studentinterpretation",
	 "logicalsubjects/ls09studentinterpretation2",
	 "logicalsubjects/ls10implicationsofresearch",
	 "logicalsubjects/ls11guidedpractice1",
	 "logicalsubjects/ls12guidedpractice2",
	 "logicalsubjects/ls13actionsteps",
	 "logicalsubjects/ls14sampletest",
	 "logicalsubjects/ls15alternativesampletest",
	 "wordknowledge/wordkn01intro",
	 "wordknowledge/wordkn02morph",
	 "wordknowledge/wordkn03models",
	 "wordknowledge/wordkn04whatis",
	 "wordknowledge/wordkn05findings",
	 "wordknowledge/wordkn06guided_1",
	 "wordknowledge/wordkn06guided_2",
	 "wordknowledge/wordkn06guided_3",
	 "wordknowledge/wordkn06guided_4",
	 "wordknowledge/wordkn06guided_5",
	 "wordknowledge/wordkn06guided_6",
	 "wordknowledge/wordkn12action",
	 "phrasalverbs/pvintroduction",
	 "phrasalverbs/pv02grammatical",
	 "phrasalverbs/pv03syntactic",
	 "phrasalverbs/pv04categories",
	 "phrasalverbs/pv05synonyms",
	 "phrasalverbs/pv06research",
	 "phrasalverbs/pv07guided",
	 "phrasalverbs/pv08determining",
	 "phrasalverbs/pv09actionsteps",
	 "relativeclausepages/relclauseintro",
	 "relativeclausepages/rcgsdescription",
	 "relativeclausepages/rcgsfunctions",
	 "relativeclausepages/rcgsintroducers",
	 "relativeclausepages/rcgsconfusion",
	 "relativeclausepages/rcgsgaps",
	 "relativeclausepages/rcresearchfindings",
	 "relativeclausepages/moredifficult",
	 "relativeclausepages/rcidentifying",
	 "relativeclausepages/rcproducing",
	 "relativeclausepages/rcsimplifying",
	 "relativeclausepages/rcimplications",
	 "referencepages/generalreferences"
);
   numpages = pages.length;  //number of pages in the array
   first = "/ntid/rate/sea/"+pages[0]+".html";
   last = "/ntid/rate/sea/"+pages[(pages.length)-1]+".html";
   fullpage = window.location.pathname;
   path = "/ntid/rate/sea/";
   i = path.length;
   page = fullpage.substr(i,fullpage.length);
   //j = fullpage.lastIndexOf("/");
   // this is to create an alternate name for php guided pages
   // up one directory with .html as extension
   x = page.lastIndexOf("/guided/");
   y = page.lastIndexOf(".php");
   php = ( ( x > 0 ) && ( y > 0 ) );
   if ( php ) {
	  len = page.length-(x+8)-5;
	  alternatepage = page.substr(0,x+1)+page.substr(x+8,len)+".html";
   }
   if ( page == "" ) {
	  page = "index.html";
   }
   //alert( "direction["+direction+"] fullpage:["+fullpage+"] path:["+path+"] page:["+page+"]");
   for (i=0; i<numpages; i++) {
	  listitem = pages[i]+".html";
	  //alert( "listitem["+listitem+"] page:["+page+"]");
	  tmpPage = page;
	  if ( ( listitem != page ) && php ) {
		 tmpPage = alternatepage;
	  }
	  if ( listitem == tmpPage ) {
		 if ( direction == -1 ) {
			if ( i > 0 ) {
			   window.top.location.href = path+pages[i-1]+".html";
			} else {
			   window.top.location.href = first;
			}
		 } else if ( direction == 1 ) {
			if ( i < (numpages-1) ) {
			   window.top.location.href = path+pages[i+1]+".html";
			} else {
			   window.top.location.href = last;
			}
		 }
		 break;
	  }
   }
}
// -->