function _getObj(objId){
	 return document.getElementById(objId);
} 

function _getObjByTag(obj,tagName){
	 return obj.getElementsByTagName(tagName);
} 

function _getAttri(obj,attributeName){
	 return obj.getAttribute(attributeName);
} 

function _SetAttri(obj,attributeName,attributeValue){
	 obj.setAttribute(attributeName, attributeValue);
}

String.prototype.trim = function()
{
    return this.replace(/(^[\s]*)|([\s]*$)/g, "");
}

function SetCookie(sName, sValue)
{
    date = new Date();
    date.setTime(date.getTime() + 1000*60*60*24*30);
    document.cookie = sName + "=" + escape(sValue) + ";path=/" + ";expires=" + date.toGMTString();
}

function GetCookie(sName)
{
// cookies are separated by semicolons
    var aCookie = document.cookie.split("; ");
    for (var i=0; i < aCookie.length; i++)
    {
    // a name/value pair (a crumb) is separated by an equal sign
    var aCrumb = aCookie[i].split("=");
    if (sName == aCrumb[0])
    return unescape(aCrumb[1]);
    }
// a cookie with the requested name does not exist
    return null;
}

function DelCookie(sName)
{
    document.cookie = sName + "=" + escape("") + "; expires=Fri, 31 Dec 1999 23:59:59 GMT;";
    
}