formcheck.js

花钱买的毕业设计。企业网络管理系统

// 自定义警告信息
var AlertMessage = [];
//要求包含@字符的警告信息
AlertMessage["@"] = "请输入正确的Email地址！";
//定义表单检查函数
function FormCheck(frmid)
{
	var Form = document.all(frmid);
	var arrChkCtls = [];
	var i;
	var strAlert = "";
	//找出表单中所有需要验证的控件
	FindCheckCtl(Form);
	//对每个空间进行验证
	for(i=0;i<arrChkCtls.length;i++)
	{
		var ctl = arrChkCtls[i];
		//空值检测
		if(ctl.chknullable == "false")
			strAlert += CheckNull(ctl);
		//类型检测
		if(typeof(ctl.chktype) != "undefined")
			strAlert += CheckType(ctl);
		//长度检测
		if((typeof(ctl.chklength) != "undefined") || (typeof(ctl.chkminlength) != "undefined") || (typeof(ctl.chkmaxlength) != "undefined"))
			strAlert += CheckLength(ctl);
		//上下界检测
		if((typeof(ctl.chkmin) != "undefined") || (typeof(ctl.chkmax) != "undefined"))
			strAlert += CheckLimit(ctl);
		//包含特定字符检测
		if(typeof(ctl.chkinclude) != "undefined")
			strAlert += CheckInclude(ctl);
		//一致性检测
		if(typeof(ctl.chkconsistant) != "undefined")
			strAlert += CheckConsistant(ctl);
	}
	//返回验证结果
	if(strAlert!="")
	{
		window.alert(strAlert);
		return false;
	}
	else
		return true;
//定义函数找出所有需要验证的控件
	function FindCheckCtl(ctl)
	{
		if(typeof(ctl.chkname) != "undefined")
			arrChkCtls[arrChkCtls.length] = ctl;
		var i;
		for(i=0;i<ctl.children.length;i++)
			FindCheckCtl(ctl.children[i]);
	}
//定义一系列函数用于不同类型的数据验证
	function CheckNull(ctl)
	{
		if(ctl.value == "")
			return ctl.chkname + "不可为空！\n";
		else
			return "";
	}
	function CheckType(ctl)
	{
		if(ctl.value == "")
			return "";
		var str = ctl.value;
		var error = 0;
		var i;
		if(ctl.chktype == "text")
		{
			for(i=0;i<str.length;i++)
				if((str.charAt(i) < "A") || (str.charAt(i) > "z"))
					error ++;
			if(error)
				return ctl.chkname + "只能包含字母！\n";
			else
				return "";
		}
		else(ctl.chktype == "number")
		{
			if(parseInt(str).toString() != str)
				error = 1; 
			if(error)
				return ctl.chkname + "只能包含数字！\n";
			else
				return "";
		}
	}
	function CheckLimit(ctl)
	{
		if(ctl.value == "")
			return "";
		var v = parseFloat(ctl.value);
		if((ctl.chktype == "number") && (CheckType(ctl)) == "")
			if((v < ctl.chkmin) || (v > ctl.chkmax))
				return ctl.chkname + "值只能介于" + ctl.chkmin + "，" + ctl.chkmax + "之间！\n";
			else
				return "";
		else
			return "";
	}
	function CheckLength(ctl)
	{
		var len = ctl.value.length;
		var i;
		var strAlert = "";
		if(typeof(ctl.chklength) != "undefined")
		{
			var arrlen = ctl.chklength.split(",");
			for(i=0;i<arrlen.length;i++)
				if(isNaN(arrlen[i] = parseInt(arrlen[i])))
					arrlen[i] = 0;
			var error = 1;
			for(i=0;i<arrlen.length;i++)
				if(len == arrlen[i])
					error = 0;
			var strtmp = ctl.chkname + "长度必须是";
			for(i=0;i<arrlen.length;i++)
				if(arrlen[i])
					strtmp += arrlen[i] + "或";
			strtmp = strtmp.substr(0,strtmp.length-1) + "！\n";
			if(error)
				strAlert += strtmp;
		}
		else
		{
			var minlen = parseInt(ctl.chkminlength);
			var maxlen = parseInt(ctl.chkmaxlength);
			if(!isNaN(minlen))
				if(len<minlen)
					strAlert += ctl.chkname + "长度必须大于" + minlen + "！\n";
			if(!isNaN(maxlen))
				if(len>maxlen)
					strAlert += ctl.chkname + "长度必须小于" + maxlen + "！\n";
		}
		return strAlert;
	}
	function CheckInclude(ctl)
	{
		var str = ctl.value;
		if(str == "")
			return "";
		var i;
		var error = 1;
		for(i=0;i<str.length;i++)
			if(str.charAt(i) == ctl.chkinclude)
				error = 0;
		var strAlert = AlertMessage[ctl.chkinclude] + "\n";
		if(error)
			return strAlert;
		else
			return "";
	}
	function CheckConsistant(ctl)
	{
		var str = ctl.value;
		var consisctl = document.all(ctl.chkconsistant);
		if(consisctl.value != str)
			return ctl.chkname + "与" + consisctl.chkname + "值不一致！\n";
		else
			return "";
	}
}