function trim(str, chars) {
	return ltrim(rtrim(str, chars), chars);
}
 
function ltrim(str, chars) {
	chars = chars || "\\s";
	return str.replace(new RegExp("^[" + chars + "]+", "g"), "");
}
 
function rtrim(str, chars) {
	chars = chars || "\\s";
	return str.replace(new RegExp("[" + chars + "]+$", "g"), "");
}


							function validateAskField(mode, obj, def, msg, invalid, err){
								//var obj_msg = document.getElementById(obj.name+"_msg");
								var str = "";
								//obj_msg.innerHTML = "";
								if(mode == "req"){
									if(obj.value == "" || obj.value == def){
									  obj.value=msg;
										//obj_msg.innerHTML = msg;
										err = true;
									}
								}
								if(mode == "captcha"){
									if(obj.value == "" || obj.value == def || obj.value == msg) {
										obj.value=msg;
										err = true;
									}
									else if (obj.value!=verify_code_text()) {
										obj.value=invalid;
										err = true;
									}
								}
								if(mode == "email"){
									str = obj.value;
									if(((str.indexOf(".") > 2) && (str.indexOf("@") > 0)) == false){
									  obj.value=msg;
										//obj_msg.innerHTML = invalid;
										err = true;
									}	
								}
									if(err == false){
										//obj_msg.innerHTML = "";
									}	
									return err;
							} 
function echeck(str) {

		var at="@"
		var dot="."
		var lat=str.indexOf(at)
		var lstr=str.length
		var ldot=str.indexOf(dot)
		if (str.indexOf(at)==-1){
		  // alert("Invalid E-mail ID")
		   return false
		}

		if (str.indexOf(at)==-1 || str.indexOf(at)==0 || str.indexOf(at)==lstr){
		 //  alert("Invalid E-mail ID")
		   return false
		}

		if (str.indexOf(dot)==-1 || str.indexOf(dot)==0 || str.indexOf(dot)==lstr){
		  //  alert("Invalid E-mail ID")
		    return false
		}

		 if (str.indexOf(at,(lat+1))!=-1){
		   // alert("Invalid E-mail ID")
		    return false
		 }

		 if (str.substring(lat-1,lat)==dot || str.substring(lat+1,lat+2)==dot){
		   // alert("Invalid E-mail ID")
		    return false
		 }

		 if (str.indexOf(dot,(lat+2))==-1){
		 //   alert("Invalid E-mail ID")
		    return false
		 }
		
		 if (str.indexOf(" ")!=-1){
		//    alert("Invalid E-mail ID")
		    return false
		 }

 		 return true					
	}