function formMsg_onsubmit()
{   
	 
	 if (formMsg.usertel.value.length!=0)
	{ 
	 	 if (!checkPhone(formMsg.usertel.value)&&!checkMobile(formMsg.usertel.value))
		 {
		 alert('输入电话不正确！\n\n例如:13860443747或0592-3300399')
		 formMsg.usertel.focus()
		 return false;
		 }  		
	}
	 if (formMsg.usermail.value.length!=0)
	{
	 	 if (!checkEmail(formMsg.usermail.value))
		 {
		 alert('输入电子邮件不正确！\n\n例如:vobao88@vobao.com')
		 formMsg.usermail.focus()
		 return false;
		 }  		
	}
	 if (formMsg.usermail.value.length==0&&formMsg.usertel.value.length==0&&formMsg.userqq.value.length==0)
	 {
		alert('电子邮件，电话，QQ至少输入一项！')
		formMsg.usermail.focus()
		return false;
	 }
	
   if (formMsg.content.value.length==0)
	{
		 alert('请输入留言内容！')
		 formMsg.content.focus()
		 return false;	  
	}
	formMsg.sub_img.disabled=true;
	formMsg.submit();
}
function checkPhone(strPhone) { 
var phoneRegWithArea = /^[0][1-9]{2,3}-[0-9]{5,8}$/; 
var phoneRegNoArea = /^[1-9]{1}[0-9]{5,8}$/; 
if( strPhone.length > 9 ) {
    if( phoneRegWithArea.test(strPhone) ){return true; }else{return false;}
}else{
    if(phoneRegNoArea.test(strPhone)){return true; }else{return false;}
}
}

function isNumber(s){ 
var regu = "^[0-9]+$"; 
var re = new RegExp(regu); 
if (s.search(re) != -1) { return true;} else { return false;} 
} 

function checkMobile(s){ 
var regu =/^[1][3,5][0-9]{9}$/; 
var re = new RegExp(regu); 
if (re.test(s)) { 
return true; 
}else{ 
return false; 
} 
} 

function checkEmail(strEmail) { 
//var emailReg = /^[_a-z0-9]+@([_a-z0-9]+\.)+[a-z0-9]{2,3}$/; 
var emailReg = /^[\w-]+(\.[\w-]+)*@[\w-]+(\.[\w-]+)+$/; 
if( emailReg.test(strEmail) ){ return true; }else{ return false; } 
}