function checkall(form){
	for (var i=0;i<form.elements.length;i++){
		var e = form.elements[i];
		if (e.name != 'all')
		e.checked = form.all.checked;
	}
}
  
function chksubmit(){ 
	for (var i=0;i<form.elements.length;i++){
		var e = form.elements[i];
		if (e.checked==true){
			if(confirm("确定要删除这些信息？")==true){
			   return true;
			   break;
			}
			return false;
		}
	}
	alert("请至少选择一项数据！");
	return false;
}

function formcheck(obj,type,text,focus){
	if (type=='chknull'){
		if (obj.value==''){
			alert(text);
			if (focus=='y'){obj.focus();}
			return false;
		}
	}
}

function valuecheck(obj,obj2,text,focus){
	if (obj.value!=obj2.value){
		alert(text);
		if (focus=='y')obj.focus();
		return false;
	}
}

function lengthcheck(obj,min,max,text,focus){
	if (obj.value.length<min||obj.value.length>max){
		alert(text);
		if (focus=='y'){obj.focus();}
		return false;
	}
}

function chktext(obj,textname){
	isChk=obj.checked;
	if (isChk==true)
	{
		var objText=document.getElementById(textname+"1");
		var theText;
		for (i=2;i<=10;i++)
		{
			theText=document.getElementById(textname+i);
			theText.value=objText.value;
		}
	}else{
		var theText;
		for (i=2;i<=10;i++)
		{
			theText=document.getElementById(textname+i);
			theText.value='';
		}
	}
}

function chknot(obj,thename){
	if (obj.value!=''){
		var objText=document.getElementById(thename);
		objText.value=objText.value+obj.value;
	}
}

function chkedit(){ 
	for (var i=0;i<form.elements.length;i++){
		var e = form.elements[i];
		if (e.checked==true){
			   return true;
			   break;
		}
	}
	alert("请至少选择一项数据！");
	return false;
}

function chkindex(){
	for (var i=0;i<form_buy.elements.length;i++){
		var e = form_buy.elements[i];
		if (e.checked==true){
			   return true;
			   break;
		}
	}
	alert("请至少选择一项数据！");
	return false;
}

function chkindex2(){
	for (var i=0;i<form_sell.elements.length;i++){
		var e = form_sell.elements[i];
		if (e.checked==true){
			   return true;
			   break;
		}
	}
	alert("请至少选择一项数据！");
	return false;
}

function checkmail(obj,textname)//验证E-MAIL格式函数
{
	smail=obj.value;
	var regg=/^[\w.-]+@([0-9a-z][\w-]+\.)+[a-z]{2,3}$/i;  
	if (regg.test(smail) == false){
		alert(textname);
		obj.focus();
		return false;
	}
}