function val(){

var el = document.forms[0].elements;
for(var i = 0 ; i < el.length ; ++i){

			camp_val = el[i].value;

			if(camp_val == ""){
				nome = el[i].name;

				if(nome=="blob"){
					nome = "txt_anexo";
				}

				alert("Favor preencher o campo [" + nome + "].");
    			if(el[i].focus)
     			el[i].focus();
				return false;

 			}

			if (i==9){
				tamanho = camp_val.length;
				teste = camp_val.substring(tamanho-4,tamanho);
				if (teste!=".doc"){
					alert ("Arquivo incorreto! Favor anexar em formato Word.");
					el[i].focus();
					return false;
				}
			}

 	}

	return true;
	
} 

<!-- Begin
function currencyFormat(fld, milSep, decSep, e) {
	var sep = 0;
	var key = '';
	var i = j = 0;
	var len = len2 = 0;
	var strCheck = '0123456789';
	var aux = aux2 = '';
	var whichCode = (window.Event) ? e.which : e.keyCode;

	if (whichCode == 13) return true;  // Enter
	key = String.fromCharCode(whichCode);  // Get key value from key code

	if (fld.value.length==0 && key==0 && fld.value==0) return false;

	if (strCheck.indexOf(key) == -1) return false;  // Not a valid key
	len = fld.value.length;

	for(i = 0; i < len; i++){
		if ((fld.value.charAt(i) != '0') && (fld.value.charAt(i) != decSep)) break;
		aux = '';
		
	}// for i
}

function formatCep(fld, milSep, decSep, e) {
	var sep = 0;
	var key = '';
	var i = j = 0;
	var len = len2 = 0;
	var strCheck = '0123456789';
	var aux = aux2 = '';
	var whichCode = (window.Event) ? e.which : e.keyCode;

	if (whichCode == 13) return true;  // Enter
	key = String.fromCharCode(whichCode);  // Get key value from key code


	if (fld.value.length==5){
		fld.value += "-"
	};

	if (strCheck.indexOf(key) == -1) return false;  // Not a valid key
	len = fld.value.length;

	for(i = 0; i < len; i++){
		if ((fld.value.charAt(i) != '0') && (fld.value.charAt(i) != decSep)) break;
		aux = '';
		
	}// for i
}