// JavaScript Document
 function chkEmailFormat(strEmail,need,divErrId,language){

	var str 
	var err = false
	var err_str = ""
	var err_strChina=""
	if(need == null){need = true}
	if(language == null){language = false }
	if(strEmail == ""){
		if(need){	
			err_str = "Please input your in common use electronics mailbox address"
			err_strChina ="请输入您的电子邮箱"
			err = true
		}
	}
	else {	
		str = strEmail.split("@")
		if(str.length !=2){err = true}
		else if(str[1].indexOf(".")<1 || str[1].lastIndexOf(".") >=str[1].length-2 || str[0] =="" || str[1] ==""){err = true}
		if(err){
			err_str = "The electronics mailbox format inaccuracy that you input!"
			err_strChina = "您输入的电子邮箱格式不正确！"
			}
	}
	if(language){err_str = err_strChina}
	
	if(err){
		if(divErrId != "" && divErrId != undefined){
			
			var divErrObj = document.getElementById(divErrId)
			var divErrObjStyle = divErrObj.style
			divErrObj.innerHTML = err_str
			divErrObjStyle.display = ""
			}
		else{
			alert(err_str)
			}
		}
	else{
		if(divErrId != "" && divErrId != undefined){
			var divErrObj = document.getElementById(divErrId)
			var divErrObjStyle = divErrObj.style
			divErrObj.innerHTML = ""
			divErrObjStyle.display = "none"
			}
		}	
	return !err
}