<!--
function submitonce(theform){
	if(document.all||document.getElementById){
	//screen thru every element in the form, and hunt down "submit" and "reset"
		for (i=0;i<theform.length;i++){
			var tempobj=theform.elements[i];
			//if(tempobj.type.toLowerCase()=="submit"||tempobj.type.toLowerCase()=="reset"||trim(tempobj.value)==""){
			if(tempobj.type.toLowerCase()=="submit"||tempobj.type.toLowerCase()=="reset"){
				tempobj.disabled=true;
			}
		}
	}
}

function resetonce(theform){
	if(document.all||document.getElementById){
	//screen thru every element in the form, and hunt down "submit" and "reset"
		for (i=0;i<theform.length;i++){
			var tempobj=theform.elements[i];
			if(tempobj.type.toLowerCase()=="submit"||tempobj.type.toLowerCase()=="reset"){
				tempobj.disabled=false;
			}
		}
	}
}

function CheckEmpty(Field, FieldTitle)
{
	if(trim(Field.value)=="")
	{
		alert("请在\"" + FieldTitle + "\"一栏中输入内容.");
		Field.focus();
		return false;
	}
		
	return true;
}

function CheckRadio(Field, FieldTitle)
{
	if(Field.value=="none")
	{
		alert("请在\"" + FieldTitle + "\"一栏中作出选择.");
		return false;
	}
		
	return true;
}

function CheckSelect(Field, FieldTitle)
{
	if(Field.value=="none")
	{
		alert("请在\"" + FieldTitle + "\"一栏中作出选择.");
		Field.focus();
		return false;
	}
		
	return true;
}

function CheckPhone(Field,FieldTitle){
	if((Field.value.length==11)||(Field.value.length==13 && Field.value.substr(0,2)=='86')){
		return CheckInteger(Field, FieldTitle);
	}
	alert("请在\""+FieldTitle + "\"中输入正确的号码.");
	Field.focus();
	return false;
}
	
function CheckInteger(Field, FieldTitle){
	if(!CheckEmpty(Field,FieldTitle)) return false;

	if(trim(Field.value)!="")
	{
		for (i=0; i<Field.value.length; i++)
		{
			ch=Field.value.charAt(i);
				
			if((ch<'0'||ch>'9')&&ch != '-' ) {
				alert("\"" + FieldTitle + "\"中只能输入数字.");
				Field.focus();
				return	false;
			}
		}
	}		
	return true;
}
	
function CheckReal(Field, FieldTitle)
{
	if(trim(Field.value) != "")
	{
		DotNum=0;
		for (i=0; i<Field.value.length;  i++)
		{
			ch=Field.value.charAt(i);
				
			if((ch<'0' || ch > '9') && ch != '.') 
			{
				alert("\"" + FieldTitle + "\"中只能输入数字.");
				Field.focus();
				return false;
			}
				
			if(ch=='.')
			{
				if(DotNum > 0) 
				{
					alert("\"" + FieldTitle + "\"中只能输入一个小数点.");
					Field.focus();
					DotNum++;
					return false;
				}
			}
		}
	}
		
	return	true;
}

function CheckMaxLength(Field, MaxLength, FieldTitle)
{
	if(trim(Field.value) != "")
	{
		if(Field.value.length > MaxLength)
		{
			alert("\"" + FieldTitle + "\"中输入的字符请不要超过" + MaxLength + "字符.");
			Field.focus();
			return false;
		}
	}
			
	return true;
}
	
function CheckMinLength(Field, MinLength, FieldTitle)
{
	if(trim(Field.value) != "")
	{
		if(Field.value.length<MinLength)
		{
			alert("\"" + FieldTitle + "\"中输入的字符请不要少于" + MinLength + "字符.");
			Field.focus();
			return false;
		}
	}
			
	return true;
}
	
function CheckOption(Field, FieldTitle)
{
	for(i=0;i<Field.length;i++)
		if(Field[i].checked)
			return true;
				
	alert("请选择\"" + FieldTitle + "\"中的值.");
	return false;
}
	//此函数用于判断Email地址是否正确
function CheckEmail(Field)
{
   // there must be >= 1 character before @, so we
   // start looking at character position 1
   // (i.e. second character)
   var i=1;
   var len=Field.value.length;
	if(len > 50)
	{
		window.alert("email地址长度不能超过50位!");
		return false;
	}
	pos1=Field.value.indexOf("@");
	pos2=Field.value.indexOf(".");
	pos3=Field.value.lastIndexOf("@");
	pos4=Field.value.lastIndexOf(".");
	//check '@' and '.' is not first or last character
	if((pos1 <= 0)||(pos1==len-1)||(pos2 <= 0)||(pos2==len-1))
	{
		window.alert("请输入有效的E-mail地址！");
		return false;
	}
	else
	{
		//check @. or .@
		if( (pos1==pos2 - 1) || (pos1==pos2 + 1) 
		  || ( pos1 != pos3 )  //find two @
		  || ( pos4<pos3 ) ) //. should behind the '@'  		
		{
			window.alert("请输入有效的E-mail地址！");
			return false;
		}
	}
	return true;
}
	
function CheckMustLength(Field, MustLength, FieldTitle){
	if(!CheckEmpty(Field,FieldTitle)) return false;
	
	if(Field.value.length != MustLength){
		alert("\"" + FieldTitle + "\"中输入的值必须是" + MustLength + "位.");
		Field.focus();
		return false;
	}

	return true;
}

function CheckIntRange(field,prompt,min,max){
	if(!CheckInteger(field,prompt))
		return	false;
	ival=parseInt(field.value);
	if( ival<min || ival > max ){
		alert(prompt + " 只能为 " + min + " 到 " + max + " 之间的数");
		field.focus();
		return	false;
	}
	return	true;
}

function CheckPass(field1,field2,FieldTitle){
	if(field1.value==field2.value){
		return true;
	}else{
		alert("两次输入的\""+FieldTitle+"\"不一致!");
		field1.select();
		return false;
	}
}
//-->