function isEmail(string) {
		if (string.search(/^\w+((-\w+)|(\.\w+))*\@[A-Za-z0-9]+((\.|-)[A-Za-z0-9]+)*\.[A-Za-z0-9]+$/) != -1){return true}
		else {return false}
	}	

	function isProper(string) {
		if (string.search(/^\w+(_\w+)?$/) != -1){return true}
		else {return false}
	}
	
	function chkDate(field,text){
	
		if (!isDate(field.value,'m/d/y')){
			if (text != ""){
				alert("\""+text+"\" must be a date in \"mm/dd/yyyy\" format");
				field.focus();
			}	
			field.value = "";
			return false;
		} else {
			return true;
		}
	}