验证邮箱输入的格式是否正确的js脚本如下：

<script language="javascript" type="text/javascript" >
/**
* Check email format
*/
function emailCheck(obj, labelName) {
var objName = eval("document.all."+obj);
var pattern = /^([\.a-zA-Z0-9_-])+@([a-zA-Z0-9_-])+(\.[a-zA-Z0-9_-])+/;
if (!pattern.test(objName.value)) {
alert("请输入正确的邮箱地址。");
objName.focus();
return false;
}
return true;
}
</script>

email：<input type="text" id="email" name="email" maxlength="30" onblur="return emailCheck('email', 'email')" style="text-align: left; width:300px;" />