function blockEnter(evt) {
		evt = (evt) ? evt : event;
		var charCode = (evt.charCode) ? evt.charCode :
			((evt.which) ? evt.which : evt.keyCode);
		if (charCode == 13 || charCode == 3) {
			return false;
		}
		else {
			return true;
		}
	}

	function SearchByLetter(cLetter){
		document.frmGlossary.cAction.value = "SEARCH_BY_LETTER";
		document.frmGlossary.searchLetter.value = cLetter;
		document.frmGlossary.submit();
	}
	function SearchByTerm() {
		if (document.frmGlossary.searchTerm.value == "") {
			alert("You must enter a text string in the Term box");
			document.frmGlossary.searchTerm.focus();
			return false;
		}
		else if (document.frmGlossary.searchTerm.value.length>30) {
			alert("You must enter a text string under 30 characters");
			document.frmGlossary.searchTerm.focus();
			return false;
		}
		else {
			document.frmGlossary.cAction.value = "SEARCH_BY_TERM";
			document.frmGlossary.submit();
		}
	}
	function SearchByDefinition() {
		if (document.frmGlossary.searchDefinition.value == "") {
			alert("You must enter a text string in the Definition box");
			document.frmGlossary.searchDefinition.focus();
			return false;
		}
		else if (document.frmGlossary.searchDefinition.value.length>30) {
			alert("You must enter a text string under 30 characters");
			document.frmGlossary.searchDefinition.focus();
			return false;
		}
		else {
			document.frmGlossary.cAction.value = "SEARCH_BY_DEFINITION";
			document.frmGlossary.submit();
		}
	}