javascript 正则表达式

<script type="text/javascript">
	function checkData() {
		
		var number = document.form1.number.value;
		var rexNumber = number.search("^\\d+(\\.\\d+)*$");
		alert(rexNumber);
		if(rexNumber != 0) {
			alert("请输入一个数字");
			return false;
		} 
		
		var email=document.form1.email.value;
		var rexEmail = email.search("^[\\w+-]+(\\.[\\w-]+)*@[\\w-]+(\\.[\\w-]+)+$");
		if(rexEmail !=0){
			alert("email地址无效");
			return false;
		}
		return true;
	}
</script>